Clangor Helmet

Wondrous item, rare (requires attunement)

This helmet was made from a temple bell and weighs 10 pounds. While wearing it, you have resistance to thunder damage and can't be deafened. In addition, whenever a creature within 5 feet of you deals bludgeoning damage to you with a melee attack, roll a d6. On a 5 or 6, the attacking creature takes 5 or 6 thunder damage, respectively.

It is for you... it is for you whom the bell tolls. With every step I take to you, with every strike you take to me, its ringing only grows.