ToME: the Tales of Maj'Eyal

While exploring level 2 of spellblaze, I suddendly had the usual chat ("we are alike, etc..."). And I discovered later a pile of boss items, and no Grand Corruptor...
Probably he has been killed, but I am 100% certain that it was not by me.
Maybe he bumped into a trap, but with his large number of HP it is rather unlikely that is was fatal.

I've seen stuff like this a couple times. Once he was dead, other times just injured to varying degrees.

Yeah, the elves are hostile to everything else that shows up in the mark. You seem them fighting elementals and whatnot pretty often. It's not inconceivable the corruptor spawned near several elementals or something and got offed in the process.