Circlet of enervation

Circlet of enervation was a spell that created a small, 6" in diameter, ring of Negative energy in the hand of the caster. The spellcaster can then launch the ring at an opponent nearby, whereupon another would appear in their hand, and would continuously replenish until the duration of the spell expired. These rings would heal and bolster the undead.

The material component of this spell was a bracelet made of jet, worth at least 100gp.