Cast Power Word Silence on it, and run in and hack it into pieces (he won't turn hostile initially since he cannot initiate the his normal dialogue).
Or you can wait for it to summon a pit fiend, have most of your party near the exit (protected from evil) and let the pit fiend and it duke it out.
You can also cast Protection from Undead, go in and hack away.
------------------
Long live H22A1!!!!!
|