Dead Ringer (Patreon)

Wonderous item, rare

This bronze mask lets out a deep, sonorous ring when struck. When you’re reduced to 0 hit points or fail a death saving throw while wearing the mask, the 3 enemy creatures nearest to you within 30 feet must succeed on a DC 15 Wisdom saving throw or take 2d12 necrotic damage. This property has no effect on creatures who aren’t missing any hit points or are deafened. If you’re healed or stabilized after falling to 0 hit points, the mask can’t be used again in this way until the following dusk. 

Listen. Death approaches.