Necromantic singularity

When cast, necromantic singularity created a temporary link between the Prime Material Plane, the Weave, and the Negative Energy Plane. The negative energy passed from the Negative to the Prime was strong enough to slay dozens, if not hundreds, of victims near the point of opening. With the collapse of the Weave, no reports of the spell being cast have been made.

A sphere of annihilation, destroyed upon casting, was required to cast the spell.