Curse of Strahd
Disguised Arcanaloth, found in the Amber Temple
This devious Arcanaloth guarded the Amber Temple from within a huge statue of the God of Secrets. He disguised himself as a frail old wizard in order to gain the party’s sympathy. He then attempted to cause an avalanche to seal the party inside, but was thwarted and escaped down the mountainside before he was slain.