Rebuke the Violent

You can use your Channel Divinity to rebuke those who use violence. Immediately after an attacker within 30 feet of you deals damage with an attack against a creature other than you, you can use your reaction to force the attacker to make a Wisdom saving throw. On a failed save, the attacker takes Radiant damage equal to the damage it just dealt. On a successful save, it takes half as much damage.