Epic Spell: Leech Field

School: Necromancy (Healing) [Negative]
Components: V,S
Range: Long
Area: 40-ft.-radius spread
Duration: 1 Round / Caster level
Saving Throw: Will negates
Spell Resistance: Yes

Leech Field saturates all creatures in the area with 4d6 points of negative energy damage per round, and transfers any lost hit points over to you, effectively granting you a temporary hit point increase. Undead are affected in the reverse, as the negative energy heals them each round.