Gory Finish

Prerequisite: Great Weapon Combat Style

By drawing upon wells of savagery, you can slay your foe in creative and horrifyingly gruesome manners, intimidating nearby foes. Once per round, when you make a melee attack with a heavy weapon that reduces a creature to 0 hit points, you can spend your bonus action to try to demoralize all foes within 30 feet who could see your attack. Make a Charisma (Intimidation) check (DC for each creature is set at the GM's discretion). On a successful check, the enemy is demoralized, taking a -2 penalty on all attack rolls, ability checks, and saving throws until the end of your next turn.