It's a quest spell (supp, I guess) for druids. I assume it was given to Lilyth for longevity, cabal/religion success, etc. Shame on the Immortal who awarded it for not adding the appropriate history.

I'm not inclined to go into the minutia of the spell, but I will say that it has safeguards and limitations in place and is not simply "where's the hurt guy?" on a stick.

I'll also add that the vast majority of Lilyth's PK wins occurred before they were awarded this ability, which you could've found out for yourself if we'd added some history.