How to fix Karlach without Dammon

So I think I messed up pretty bad. I stole the statue from the druids in emerald grove and I'm pretty sure they killed Dammon, idk if that's possible, but he's not there so im imagining the worst scenario possible rn. If there's any other way to fix Karlach I'd really like to know, thanks. (I have not finished the game yet, so please don't spoil)