Great Weapon Master

You gain the following benefits.

Heavy Weapon Mastery

When you hit a creature with a weapon that has the H property as part of the Attack action on your turn, you can cause the weapon to deal extra damage to the target. The extra damage equals your Proficiency.

Hew

Immediately after you score a Critical Hit with a Melee weapon or reduce a creature to 0 Hit Points with one, you can make one attack with the same weapon as a Bonus Action.