Skull Crusher (5e Equipment)

Weapon (warhammer), very rare

You have a +2 bonus to attack and damage rolls with this weapon.

Heavy Strikes. Once per turn, upon hitting a creature with this weapon, the wielder may opt to empower the strike, attempting to shove the creature that was the target of the attack regardless of the creature's size. Make a Strength (Athletics) check vs the target's Strength (Athletics) or Dexterity (Acrobatics) (target's choice). If you win the contest, you either knock the target prone or push it 5 feet away from you. If the attack roll made to shove a target is a critical hit, you have advantage on your Strength (Athletics) check made to shove the target.