# Great Weapon Master *Source: Player's Handbook (2024) p. 204* **Prerequisite**: 4th; Strength 13 or higher You gain the following benefits. **Ability Score Increase.** Increase your Strength score by 1, to a maximum of 20. **Heavy Weapon Mastery.** When you hit a creature with a weapon that has the [Heavy](/Rules/Source/item-properties.md#Heavy) property as part of the [Attack](/Rules/Source/actions.md#Attack) action on your turn, you can cause the weapon to deal extra damage to the target. The extra damage equals your [Proficiency Bonus](/Rules/Source/variant-rules/proficiency-xphb.md). **Hew.** Immediately after you score a [Critical Hit](/Rules/Source/variant-rules/critical-hit-xphb.md) with a Melee weapon or reduce a creature to 0 [Hit Points](/Rules/Source/variant-rules/hit-points-xphb.md) with one, you can make one attack with the same weapon as a [Bonus Action](/Rules/Source/variant-rules/bonus-action-xphb.md).