Retaliation is a Barbarian feature gained at level 10 in the 2024 SRD. When you take damage from a creature that is within 5 feet of you, you can take a Reaction to make one melee attack against that creature, using a weapon or an Unarmed Strike.
When you take damage from a creature that is within 5 feet of you, you can take a Reaction to make one melee attack against that creature, using a weapon or an Unarmed Strike.