Vile Haemorrhage

Evocation
Level: Chr 4 (Alchemist, bloodranger, magus, sorcerer/wizard)
Components: S, M (teeth of a vampire bat or a dried leach)
Casting Time: 1 standard action
Range: 60 ft.
Effect: 1 round, then instantaneous
Duration: instantaneous
Saving Throw: Reflex half
Spell Resistance: Yes

DESCRIPTION
When you cast this spell you roll a D10+caster level. If the amount rolled is equal to or greater than the opponent’s hit points, they just die; the target’s blood rapidly expands in an instant killing them in a horrible, disgusting explosion. If the amount rolled is less than the opponent’s current hit points, you do nothing. But regardless of the roll, on your next round, you take half the damage done to your opponent