You gain this spell on a roll of 4 or 54 on the Forbidden Spell list.

Upon a successful touch attack the target is slain.  Creatures within 30 feet of the slain creature, except yourself, must succeed a Constitution save or take 10d8 necrotic damage.  A creature reduced to 0 by this spell is also slain.  Any creature slain by this spell cannot be resurrected by any means.

In addition to the usual penalties for casting a forbidden spell your Constitution score is permanently reduced by an amount equal to the number of creatures slain.