How to calculate attack bonus

Attack, abbreviated in-game as ATK, is an attribute used to calculate how much damage a character (or enemy) does. All forms of damage calculation except specific Elemental Reactions scale linearly with ATK. The total ATK formula is:[1] ATK = [ ( ATK Character + ATK Weapon ) × ( 1 + % ATK Bonus...

How to calculate attack bonus. In that, you can see the problem areas exist mostly during levels 5-6 and then 10-18, shown by comparing the martial attack bonus versus spell attack bonus. That's when the difference between attack roll bonuses of martials and casters is greater than 1. I think 1 is an acceptable difference.

He just uses the +2 for the short sword melee attack. That site has already calculated the attack bonus. As you calculated, the goblin is getting is +1 from BAB, +0 from STR, and +1 from size, for a total attack bonus of +2. For comparison, note that he has a +4 with his shortbow: +1 from BAB, +2 from DEX, and +1 from size.

The attack bonus: a simple phrase, but one that carries enormous weight in a game of Dungeons & Dragons 5e. It’s the invisible thread that weaves through every combat, a silent player on the battlefield. In the dance of steel and magic, it’s the rhythm that guides your steps, the pulse that drives your actions.So it'll be "1d20 + proficiency + STR or DEX (for finesse weapons)" to attack. and "weapon damage + STR or DEX (for finesse weapons)" to damage. 1. EdmonCaradoc. • 2 yr. ago. Treat it as a normal weapon. Your bonus to hit is modifier (Strength or dex, somewhere between 0 and +5), plus your proficiency bonus.More people are reading about the attack now than when it actually happened. As details about multiple attacks on Paris last week emerged, news about another attack began to circul...The bonuses an item provides are placed into three different categories: Attack bonus, Defence bonus, and Other bonuses. These bonuses, in addition to level of the player's relevant combat skills and the attack style used, are used to calculate both the damage dealt and received during combat, and the likelihood of an attack being successful.There are four ways to buy up your attack bonus. If you buy the relevant Attribute you boost all attacks, defenses, and skills using that attribute. If you buy the Close or Ranged Combat Advantage, you get a +1/rank of the Advantage bonus to all Close/Ranged attacks. If you buy the Close/Ranged Combat skill (which requires a subskill ...The exact bonuses that apply depend on the nature of the attack, but they all follow this general formula: 1d20 + Ability Modifier Bonus + Proficiency (if applicable) + …Apr 19, 2019 ... ... bonuses. Add all attacks in a round together. This provides the "base" average damage. Accurate average Damage per round: Convert your ...

Calculate your spell save DC using the basic formula: 8 + spellcasting ability modifier + proficiency bonus. Use your character’s spell DC when you cast spells on your enemies. Certain spells will force your enemies to make a …As a wizard, quarterstaves use strength, so you add whatever your STR mod is to the attack and damage rolls. A quarterstaff is a melee weapon and as such uses strength for attack/damage rolls. Your attack bonus would be proficiency+strength modifier. Your damage bonus would just be your strength modifier.Feat/Racial bonuses. Item bonus. Power bonus. Untyped bonuses. A Longsword is a +3 proficiency weapon (PHB pg 218). So you're getting +5 from strength and +3 from the proficiency, so you're at +8. The last +1 comes from a Knight mechanic, Weapon Talent, which gives a flat +1 bonus to all attacks. And there you are, with +9. 3.1. Yes. Weapon focus gives its bonus to all attacks with that weapon. Strength gives its bonus to all strength-based attacks (which is all regular attacks unless you use weapon finesse or some other odd ability). So with your preferred weapon it's going to be +10/+5. If you pick up a different kind of weapon, it's +9/+4.Base Attack Bonus. Base Attack Bonus (BAB) defines a creature's basic ability to land a damaging hit on an enemy if no other bonuses or modifiers would play a role. To see how the Base Attack Bonus affects combat, see Combat . A character's BAB increases with higher levels automatically depending on his or her Class.When calculating for your Attack Bonus the basic formula to follow is this: 1 d20 roll + Ability Score Modifier + Proficiency Modifier + Magic Weapons Bonus + Class …

He says, “your attack bonus to hit should be +1 because…” I can’t really remember his reasoning but I am using a short sword with proficiency of course and this character also has a +5 in dexterity and a +2 proficiency bonus. He is also level 1. I was wondering if my attack bonus should be +7 or if it should be +1.To calculate a character’s spell attack bonus, you add together their ability score modifier, their proficiency bonus, and any other modifiers that apply. For example, a character with a Intelligence score of 16, a proficiency bonus of +2, and the Spellcasting Focus feat would have a spell attack bonus of +7.Your attack bonus with a melee weapon is the following: Base Attack Bonus + Strength modifier + size modifier. With a ranged weapon, your attack bonus is the following: Base Attack Bonus + Dexterity modifier + size modifier + range penalty. View All Rules ».Weapon attacks are Str/Dex Mod + proficiency bonus if you are proficient in the weapon, at level 1 that bonus is +2 so that's how it's a +5, and for damage you add your Str/Dex Mod. Hope this helps! If it's a melee weapon, add your STR modifier and, if you have proficiency in that kind of weapon, add your proficiency bonus, too. A second attack is gained when a base attack bonus reaches +6, a third with a base attack bonus of +11 or higher, and a fourth with a base attack bonus of +16 or higher. Base attack bonuses gained from different sources, such as when a character is a multiclass character, stack.

Dierks bentley tinley park.

Attack Bonus Ratio on Bennett's Ult. Good day bennett mains, is the attack bonus ratio on bennys ult based on his attack or the attack of the one inside the ult? It’s based on his attack, and only his base attack (level plus weapon) so stacking attack artifacts doesn’t help. Weapon attacks are Str/Dex Mod + proficiency bonus if you are proficient in the weapon, at level 1 that bonus is +2 so that's how it's a +5, and for damage you add your Str/Dex Mod. Hope this helps! If it's a melee weapon, add your STR modifier and, if you have proficiency in that kind of weapon, add your proficiency bonus, too.The intent is that the druid uses the bonus in the beast's stat block for any proficiency the druid lacks. Unless the druid is proficient with claws, bites, or other types of the creature's attacks, it seems that there is no cause to apply the druid's proficiency bonus. Remember, the lack of an explicit "no" does not translate to a "yes". If ... How do I calculate base attack bonus BAB. You take the max numbers. From each of the class lines that you have. And add them. So if youre solarian 3/mystic1, you get +3 from solarian, +0 from mystic. It’s pretty common for new players to mistakenly add the BABs together from each level; I blame the plus symbol added to everything in TTRPGs. Your attack bonus with a melee weapon is the following: Base Attack Bonus + Strength modifier + size modifier. With a ranged weapon, your attack bonus is the following: Base Attack Bonus + Dexterity modifier + size modifier + range penalty. View All Rules ».

For the purpose of these attacks, the monk's base attack bonus from his monk class levels is equal to his monk level. This makes the attack formula: Monk Level + Str Mod - 2 + 1d20. The class table combines Monk Level and the -2 penalty into the column Flurry of Blows Attack Bonus. Giving you the formula: Flurry of Blows Attack Bonus + Str Mod ...How to Calculate a Ranged Touch Attack. Making a ranged touch attack starts with a d20 roll. Add your character’s base attack bonus and dexterity modifier as well as any other bonuses. Lastly, calculate the range penalty, if any. When making ranged touch attacks against an enemy, you use the enemy’s Touch AC. This type of attack ignores an ...A weapon can have a bonus associated with them. Masterwork, like you discovered, adds +1 to the weapon attack. But magically enchanting weapons will grant even higher bonuses. bonus from feats or class features. Lastly, feats or class features can also add (or subtract) from attack rolls.So you could take a −1 penalty to attack to gain an extra +2 damage, or (provided your BAB is high enough) a −5 penalty to attack for a +10 bonus to damage, and so on. If you use Power Attack, then you must declare the penalty you are taking before you roll to attack, and the penalty and bonus apply to all attack rolls you make this turn.Quickly calculate your barbarian attack and damage bonuses.Yes. You are correct - melee weapons use strength (even if thrown), ranged weapons use dexterity. On slight complication is that weapons with the Finesse characteristic use strength or dexterity at the users choice (usually whichever is better). If the person is proficient with the weapon they also add their proficiency bonus.How The Same Type Attack Bonus Works In the equation that determines the overall Damage of an attacking move, STAB is calculated alongside many other factors that determine how much HP the target ...The same basic system is used in D&D 3.x. 20 - your base THAC0 became your Base Attack Bonus, and your strength bonus adds to your base attack bonus. If you subtract a 3.x attack bonus from 20, you get your THAC0 from AD&D (roughly, there's no direct conversion possible between the two editions).And for damage: When attacking with a weapon, you add your ability modifier—the same modifier used for the attack roll—to the damage. This: From RAW: Your attack roll is 1d20 + your ability modifier + your proficiency bonus if you're proficient with the weapon you’re using. And for damage:

Super simple formula is Proficiency Bonus + Ability Modifier = Attack Bonus. In the case of a rogue using a scimitar in your main hand your Proficiency Bonus is based on your level, and your Ability Modifier comes from either your strength or dexterity as scimitars have the keyword finesse. Note that you cannot add your Ability Modifier to the ...

Base number for Save DC. The spell save DC is 8 + proficiency bonus + intelligence modifier. At level 1 with a Int of say 15 (which mod is +2), you'd have 8 + 2 + 2 = 12. For attack there isn't a base. Your spell Attack is your intelligence modifier + proficiency bonus. Using the the example of a level 1 with 15 Int, you get 2 + 2 = 4. Share.Feb 8, 2021 · It is optional, but there is rarely any reason to choose the lower ability. attack roll. d20 + ability modifier + proficiency bonus. d20 + 4 + 3. damage roll. damage dice + ability modifier. d6 + 4. Thus, you have a +7 bonus to attack rolls, and a +4 bonus to damage rolls with your unarmed strikes and monk weapons. Share. Attack, abbreviated in-game as ATK, is an attribute used to calculate how much damage a character (or enemy) does. All forms of damage calculation except specific Elemental Reactions scale linearly with ATK. The total ATK formula is:[1] ATK = [ ( ATK Character + ATK Weapon ) × ( 1 + % ATK Bonus...Base attack bonus is used for ANY attacks, including Grapple and Disarm attempts (see the Combat chapter for more information). ... Oh, uh, another thing: How to calculate "attack bonus" with actual attacks. I didn't answer that core question. Let's say I'm a Level 5 Fighter with a Longsword, and my strength is 14 (giving me a +2 modifier).Basic Attack and Damage Bonuses. Source Starfinder Core Rulebook pg. 241. For ease of reference, the following are the basic formulas for calculating ranged attack bonuses, ranged damage, melee attack bonuses, and melee damage. Various other bonuses to attacks and damage can apply from class features, feats, special circumstances, and so on.A second attack is gained when a base attack bonus reaches +6, a third with a base attack bonus of +11 or higher, and a fourth with a base attack bonus of +16 or higher. Base attack bonuses gained from different sources, such as when a character is a multiclass character, stack.Using this we can now predict what AR will be at different STR values. If we wanted to figure out what AR would be at 40 STR, we would use 0.75 as saturation (as 40 in a stat is 75% of the maximum bonus): FinalAR = BaseAR + (BaseAR * WeaponMod * Saturation) FinalAR = 266 + (266 * 0.7669 * 0.75) FinalAR = 266 + 153.Your attack bonus is your relevant modifier + proficiency + any other potential modifiers. Most melee weapons will be based on your strength modifier. If the weapon has the "finesse" property, it will use your dexterity modifier. If your level 1 ranger has +3 Dex, then your attack bonus with your bow would be +5 (3 from Dex, 2 from prof).Base number for Save DC. The spell save DC is 8 + proficiency bonus + intelligence modifier. At level 1 with a Int of say 15 (which mod is +2), you'd have 8 + 2 + 2 = 12. For attack there isn't a base. Your spell Attack is your intelligence modifier + proficiency bonus. Using the the example of a level 1 with 15 Int, you get 2 + 2 = 4. Share.D&D 5e bonuses are lower and calculated differently. In D&D 5e your progress is much slower: at level 11 your attack is only 5 higher (2 from prof, 2 from ability, 1 from magic), meaning you "elevate over worldly threats" much slower. This lower bonus shows a different calculation based on level.

Toro hibachi sushi and asian.

How many kids does jj the boss have.

20. Skill/Perception. 3. 9. 17*. * This is also the minimum level for apex items. If your item includes item bonuses, check the table below for the minimum item levels the game’s math expects permanent bonuses to be applied to. A lower-level item might give such a bonus temporarily, but keep track to make sure the item isn’t effectively ...Determine the spell attack roll with the following formula. Spell attack roll result = d20 roll + ability modifier used for spellcasting + proficiency bonus + other bonuses + penalties. If you have the ability to cast spells, you’ll have a proficiency rank for your spell attack rolls, so you’ll always add a proficiency bonus.Attack, abbreviated in-game as ATK, is an attribute used to calculate how much damage a character (or enemy) does. All forms of damage calculation except specific Elemental Reactions scale linearly with ATK. The total ATK formula is:[1] ATK = [ ( ATK Character + ATK Weapon ) × ( 1 + % ATK Bonus...Bombs are a ranged weapon. So the attack roll will look like this. Dex Modifier + Proficiency + Level. When they get other types of bonuses then include those. So at level 1 it should look like this: +3 (with 16 dex) + 2 (trained) + 1 (level) = +6 to attack roll. Note: Even though the bomb is thrown it does not have the thrown trait.Any class with less than the best BAB gives you a +0 to start, so there's a penalty to multiclassing as it puts you off your attack progression, so cleric 4 is +3, monk 2 is +1, and swoprdsage 2 is +1 fopr a total BAB of +5. The alternative is the fractional base attack bonus, which allows for a slightly higher bonus at when multiclassing.In that, you can see the problem areas exist mostly during levels 5-6 and then 10-18, shown by comparing the martial attack bonus versus spell attack bonus. That's when the difference between attack roll bonuses of martials and casters is greater than 1. I think 1 is an acceptable difference.A weapon can have a bonus associated with them. Masterwork, like you discovered, adds +1 to the weapon attack. But magically enchanting weapons will grant even higher bonuses. bonus from feats or class features. Lastly, feats or class features can also add (or subtract) from attack rolls.Nov 17, 2022 ... Inspired by a patreon request and reddit post, here's a look at some of the strange and quirky attack bonuses in Age of Empires 2. ….

Feat/Racial bonuses. Item bonus. Power bonus. Untyped bonuses. A Longsword is a +3 proficiency weapon (PHB pg 218). So you're getting +5 from strength and +3 from the proficiency, so you're at +8. The last +1 comes from a Knight mechanic, Weapon Talent, which gives a flat +1 bonus to all attacks. And there you are, with +9. 3.If a character uses a ranged weapon to make a melee attack, or throws a melee weapon that does not have the thrown property, it also deals 1d4 damage. An improvised thrown weapon has a normal range of 20 feet and a long range of 60 feet. As for the ability modifier, you usually use Strength, since improvised weapons don't have …Yes. You are correct - melee weapons use strength (even if thrown), ranged weapons use dexterity. On slight complication is that weapons with the Finesse characteristic use strength or dexterity at the users choice (usually whichever is better). If the person is proficient with the weapon they also add their proficiency bonus.So for you, your rolls go like this; ATTACK ROLLS: Longbow: 1d20+proficiency+DEX modifier. Hand Axe: 1d20+proficiency+STR modifier and the same again for your bonus action attack. Club: 1d20+proficiency+STR modifier. DAMAGE ROLLS: Longbow: 1d8+DEX modifier. Hand Axe: 1d6+STR modifier and just 1d6 for your bonus action attack.A Fighter making a melee attack with a longsword would use the following to determine their Attack Bonus: Str Mod + Proficiency = Attack Bonus. A Ranger making a ranged attack with a longbow would use the following …For the purpose of these attacks, the monk's base attack bonus from his monk class levels is equal to his monk level. This makes the attack formula: Monk Level + Str Mod - 2 + 1d20. The class table combines Monk Level and the -2 penalty into the column Flurry of Blows Attack Bonus. Giving you the formula: Flurry of Blows Attack Bonus + Str Mod ... Additionally, the proficiency bonus represents your experience from a role playing viewpoint, and your power curve from a game design viewpoint. Example: Suppose you are playing the druid class in D&D 5e, if you are at +10 ability modifier, your proficiency bonus is +2, find your attack bonus. Therefore, the attack bonus is 12. The ability score roll. When you roll ability scores, the standard method is to roll 4d6, discard the lowest result, then add up the other three results. This gives results between 3 and 18. I don't see any evidence of you discarding the lowest roll, but let's suppose for a moment that you really rolled a 16 as the sum of your three highest dice.To calculate your actual attack bonus for a specific attack type, you then add any other modifiers involved to the BAB, such as for the stat involved (Str for melee or Dex for missile, generally). In your specific case, assuming you are level 1, your BAB will be +1. Your attack bonus with the melee weapons (Axe and Great Club) will be your BAB ... How to calculate attack bonus, You can add their proficiency bonus to attacks made with any of those. But if you pick up the Fighter’s dropped battleaxe – something you’re not trained to use – no proficiency bonus for you. Weapon attack roll with proficient weapon = d20 + proficiency bonus. Weapon attack roll with non-proficient weapon = d20., The bonuses an item provides are placed into three different categories: Attack bonus, Defence bonus, and Other bonuses. These bonuses, in addition to level of the player's relevant combat skills and the attack style used, are used to calculate both the damage dealt and received during combat, and the likelihood of an attack being successful., If you have an irregular, too speedy heartbeat, watch out! A rapid pulse can be the symptom of heart attack. You may either have an attack very soon or be already in trouble. Usual..., Roll a d20 and add your character’s ability score modifier to the result to calculate a saving throw. Add a proficiency bonus if they're proficient in that saving throw. Death saving throws are even simpler: roll a d20 and take note of the result. Rolling a 10 or above is a success, while a 9 or below is a failure., 1. Yes. Weapon focus gives its bonus to all attacks with that weapon. Strength gives its bonus to all strength-based attacks (which is all regular attacks unless you use weapon finesse or some other odd ability). So with your preferred weapon it's going to be +10/+5. If you pick up a different kind of weapon, it's +9/+4., Ranged attack rolls use Dexterity as their ability modifier. Ranged attack roll result = d20 roll + Dexterity modifier + proficiency bonus + other bonuses + penalties. When attacking with a weapon, whether melee or ranged, you add your proficiency bonus for the weapon you're using. Your class determines your proficiency rank for various weapons., An Attack Bonus is a number that’s added to a D20 roll when you make an attack in D&D 5e. There are several types of attacks that have an attack bonus – melee attacks, ranged attacks, spell attacks, and thrown weapon attacks. And a character’s attack bonus may differ for some of these, or all of these. The number for an attack bonus ..., Class Bonuses. The lesson to be taken here is simple. Play to your strengths, and exploit the enemy’s weaknesses. For example. If you’re playing as a Paladin and use Divine Smite on an Undead creature you get 1d8 dice to roll on top of other 1d8 dice that you get. A spell attack bonus on top of a melee attack will see the enemy go down real ..., More people are reading about the attack now than when it actually happened. As details about multiple attacks on Paris last week emerged, news about another attack began to circul..., He just uses the +2 for the short sword melee attack. That site has already calculated the attack bonus. As you calculated, the goblin is getting is +1 from BAB, +0 from STR, and +1 from size, for a total attack bonus of +2. For comparison, note that he has a +4 with his shortbow: +1 from BAB, +2 from DEX, and +1 from size., Although deer generally prefer to avoid people, they do sometimes attack humans. Deer are most likely to attack humans during rutting season or if they perceive a human to be a thr..., Calculate your spell save DC using the basic formula: 8 + spellcasting ability modifier + proficiency bonus. Use your character’s spell DC when you cast spells on your enemies. Certain spells will force your enemies to make a saving throw versus your spell save DC., The description of the Shillelagh cantrip says:. The wood of a club or quarterstaff you are holding is imbued with nature’s power. For the duration, you can use your spellcasting ability instead of Strength for the attack and damage rolls of melee attacks using that weapon, and the weapon's damage die becomes a d8., For the purpose of these attacks, the monk's base attack bonus from his monk class levels is equal to his monk level. This makes the attack formula: Monk Level + Str Mod - 2 + 1d20. The class table combines Monk Level and the -2 penalty into the column Flurry of Blows Attack Bonus. Giving you the formula: Flurry of Blows Attack Bonus + Str Mod ..., If the roll + attack bonus > enemy AC, you hit. It's actually not if you roll higher than AC, it's if you equal or higher. Just like when you need to make a DC, if you roll equal or higher, you make it. Quick edit: And the only time your weapon will be relevant is probably on opportunity attacks, because you can cast cantrips as much as you ..., , The same basic system is used in D&D 3.x. 20 - your base THAC0 became your Base Attack Bonus, and your strength bonus adds to your base attack bonus. If you subtract a 3.x attack bonus from 20, you get your THAC0 from AD&D (roughly, there's no direct conversion possible between the two editions)., Apr 20, 2020 · If a character uses a ranged weapon to make a melee attack, or throws a melee weapon that does not have the thrown property, it also deals 1d4 damage. An improvised thrown weapon has a normal range of 20 feet and a long range of 60 feet. As for the ability modifier, you usually use Strength, since improvised weapons don't have the Finesse property. , The stats blocks for published monsters will already be applying the monster's proficiency bonus where appropriate. For example, the CR1/2 Orc has a greataxe attack: Greataxe. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 9 (1d12 + 3) slashing damage. That +5 attack bonus includes the Orc's +3 Strength modifier and their +2 ..., The role of the Spell Attack Bonus becomes apparent when you cast a spell that necessitates an attack roll, such as Fire Bolt or Inflict Wounds. When you execute such a spell, you roll a 20-sided die (a d20), add your Spell Attack Bonus to the outcome, and match it against the target’s Armor Class (AC). If your total meets or surpasses their ..., Here’s how to calculate your attack bonus: Non-Finesse Melee Weapon: Strength Modifier + Proficiency Bonus (if proficient with the weapon) ... Spell Attack Bonus. Your spell attack bonus is equal to your spellcasting ability modifier plus your proficiency bonus. So if your class uses Wisdom as their spellcasting ability and has a +3 Wisdom ..., To calculate this damage, substitute the proc percentage (e.g. 240% for Prototype Archaic R1) for Talent in the damage formula. Note that weapon proc effects always deal Physical damage, and are therefore affected by Physical damage bonuses and Physical resistance, even if an Elemental attack is used to trigger them., It is optional, but there is rarely any reason to choose the lower ability. attack roll. d20 + ability modifier + proficiency bonus. d20 + 4 + 3. damage roll. damage dice + ability modifier. d6 + 4. Thus, you have a +7 bonus to attack rolls, and a +4 bonus to damage rolls with your unarmed strikes and monk weapons. Share., If a character uses a ranged weapon to make a melee attack, or throws a melee weapon that does not have the thrown property, it also deals 1d4 damage. An improvised thrown weapon has a normal range of 20 feet and a long range of 60 feet. As for the ability modifier, you usually use Strength, since improvised weapons don't have the Finesse property., How to calculate Attack Bonus? Attack bonus is calculated by adding proficiency and relevant skill modifiers to an attack roll. Obviously, you only add proficiency if the character is proficient with the weapon they …, \$\begingroup\$ But they seem to be consistently different. The Knight and Veteran both have Heavy Crossbows with no damage bonus, while the Assassin and Bandit use Light Crossbows and do get a damage bonus. Looks like "Drow" and "Half-Dragon" veteran are consistent with damage bonuses on both Light and Heavy, so I just had to look further …, Yes. You are correct - melee weapons use strength (even if thrown), ranged weapons use dexterity. On slight complication is that weapons with the Finesse characteristic use strength or dexterity at the users choice (usually whichever is better). If the person is proficient with the weapon they also add their proficiency bonus., If a character uses a ranged weapon to make a melee attack, or throws a melee weapon that does not have the thrown property, it also deals 1d4 damage. An improvised thrown weapon has a normal range of 20 feet and a long range of 60 feet. As for the ability modifier, you usually use Strength, since improvised weapons don't have the Finesse property., To calculate Armor Class, you need to remember an easy formula. At level 1, your AC has nothing going on and is straightforward as it can be. The standard AC is; AC = 10 + Dexterity Mod. To change the AC, the base 10 number must be changed. The most common way to do this is through your armor., Enchanted Weapons. Class Features. Conclusion. How to Determine Attack Bonus. Learning to determine the attack bonus is easy once you get the hang of it. To …, Proficiency Bonus: You add your proficiency bonus to your attack roll when you attack using a weapon with which you have proficiency, as well as when you attack with a spell. Rolling 1 or 20 Sometimes fate blesses or curses a combatant, causing the novice to hit and the veteran to miss. , Importance of Spell Attack Bonus. Discover why a high spell attack bonus is crucial for spellcasters. From ensuring your spells hit their mark to overcoming magical resistances, its significance cannot be overstated. How to Calculate Spell Attack Bonus. The heart of the matter—learn the step-by-step process of calculating your spell attack bonus., Before you make a melee attack with a heavy weapon that you are proficient with, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage. Currently, I have a greataxe with a +5 modifier to the attack roll (+3 Str mod and +2 proficiency bonus). My question regards the -5 to hit from the feat.