Shield Bash

 Creatures that are proficient in shields can use a shield as an improvised melee weapon with Light or Heavy shields. Light shields deal 1d4 + strength modifier bludgeoning damage and heavy shields deal 1d6 + Strength modifier bludgeoning damage. (character must specify which shield type they have equipped). Whenever you succeed in shoving a creature while having a shield equipped, the creature also takes damage as if you had hit it with a melee attack.