Super Counter (5e Feat)
From D&D Wiki
Prerequisites: Dexterity 13 or higher.
You are a specialist in countering attacks. You gain the following benefits:
- You can choose to let a creature make an attack with advantage against you. If the attack hits you, you can use your reaction to make an attack with advantage against this creature. On a hit, roll the damage die, and subtract the amount from the damage you would've taken. The creature with the lowest result on the damage roll takes the remaining damage.
- You can use your bonus action to choose one creature you can see within 30 feet. If that creature makes a melee attack against you before the start of your next turn, you can use your reaction to make an opportunity attack against it.