Bitter Retribution

Whenever an enemy melee attacks you
you can use your reaction to immediately counterattack with modifiers
Enemy's Attack...
—Dealt No Damage: 1d6 disadvantage to hit
—Causes Nonlethal Damage: no change
—Causes Lethal Damage: +1 to hit and all attacks against this enemy for this combat deal 1d4 extra damage (doesn't stack)
Serves you right