Great weapon master

- On your turn, when you score a critical hit with
a melee weapon or reduce a creature to 0 hit
points with one, you can make one melee
weapon attack as a bonus action.
- 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.