List of features and items that affect attack rolls

This is a comprehensive list of all sources of effects that directly affect attack rolls.

Class features

Feature	Class	Attack roll bonus	Affects
Guided Strike	War cleric (level 1)	10	Any attack when consuming Channel Divinity Charge
Bardic Inspiration	Bard (level 1)	1d6, 1d8, or 1d10	Any attack when using  Bardic Attack
Sacred Weapon	Oath of Devotion paladin (level 3)	Charisma modifier	Any attack with the blessed weapon
Precision Attack	Battle Master fighter (level 3)	1d8 or 1d10	Next weapon attack after using Precision Attack
Bend Luck	Wild Magic sorcerer (level 6)	1d4	Any attack when spending 2 Sorcery Point on Bend Luck: Attack Roll
Bolstering Magic: Boon	Wild Magic barbarian (level 6)	1d4	All attacks for 10 turns
Aspect of the Beast (Tiger)	Wildheart barbarian (level 6)	Strength modifier	All attacks against  Bleeding or  Poisoned targets
Tavern Brawler	Any (feat)	Strength modifier	Unarmed attacks and throwing attacks
Favourable Beginnings	Any (illithid power)	Proficiency bonus	Any attack against creatures who have not been targeted by Favourable Beginnings

Items

Item	Attack roll bonus	Affects
Mask of Soul Perception	2	All attacks
Legacy of the Masters	2	All attacks
Horns of the Berserker	2	All attacks while being under max HP
Winkling Gloves	1	All attacks
Bhaalist Gloves	1	All attacks
Gauntlets of the Warmaster	1	All attacks
Gloves of Dexterity	1	All attacks
Blackguard's Gauntlets	1	All attacks
Unwanted Masterwork Gauntlets	1	All attacks
Gloves of The Duellist	2	Melee attacks with one-handed weapons when not duel wielding
Marksmanship Hat	1	Ranged weapons, ranged spells, and throwing attacks
Corellon's Grace	1	Unarmed attacks
Dark Displacement Gloves	1	Throwing attacks
Sword of the Emperor	1d4	All attacks against shapeshifted or polymorphed creatures
Bow of the Banshee	1d4	All attacks against frightened targets
Monster Slayer Glaive	1d4	All attacks against monstrosities
Circlet of Hunting	1d4	All attacks against marked targets
Phalar Aluve	1d4	All attacks by allies within 9 m / 30 ft for 5 turns after using  Phalar Aluve: Sing
Cerebral Citadel Gloves	1d4	All attacks for 3 turns after inflicting frightened
Rhapsody	1, 2, or 3	All attacks
Gauntlets of Surging Accuracy	1d4	All attacks for the rest of the turn after using  Action Surge
Mutilated Carapace	1	All attacks while shapeshifted or disguised
Ritual Dagger	1d4	All attacks after attacking with the dagger or using  Blood Sacrifice

Spells

Spell	Attack roll bonus	Affects
Bless	1d4	All attacks by affected creatures
Magic Weapon	1, 2, or 3	Attacks with the enchanted weapon
Elemental Weapon	1	Attacks with the enchanted weapon
Draconic Elemental Weapon	1	Attacks with the enchanted weapon
Elemental Age	1	Attacks with the enchanted weapon

Consumables

Item	Attack roll bonus	Affects
Oil of Accuracy	2	Attacks with coated weapon for 10 turns
Diluted Oil of Sharpness	1	Attacks with coated weapon for 10 turns
Elixir of Heroism	1d4	All attacks until long rest

Conditions

Condition	Attack roll bonus	Affects
Sweet Stone Features	1d4	All attacks
Lightning Charges	1	All attacks while you have at least one Lightning Charge
Loviatar's Love	2	All attacks while you have less than 30% HP
Happy	1	All of Astarion's attacks after feeding with  Vampire Bite
Bliss Spores	1d6	All attacks until the next long rest