Full Counter (5e Feat)
From D&D Wiki
Prerequisites: Dexterity 13 or higher
Reflect attacks aimed at you back at your enemy. When you are hit by a melee weapon attack, you can use your reaction to block that attack, reducing the damage by an amount equal to your proficiency bonus, and dealing the same amount of damage back to the attacker. The damage type is the same of the melee weapon you are wielding, or bludgeoning (if you are unarmed).