Soulless Escort

"While Retribution handlers endeavor to train soulless as soldiers, some are destined to serve another function. Energy flows sent to destroy Retribution soldiers are siphoned into the body of the soulless. If they siphon too much it prompts complete organ failure. Heart and lungs burst from hostile energy pouring into the soulless, while leaving those allies around him untouched."

More elf-y goodness...ish.