Langdedrosa is a half-dragon that is a member of the Cult of Tiamat. Specifically, he is a Wearer of Purple, part of the upper echelons of the cult. It is currently unknown whether he is leading by his own volition or taking orders from higher-ups. He is directly responsible for the destruction of Greenest and the abduction of the survivors. He is currently in possession of a fossilized bone from an ancient dragon, evidently an ingredient required for some ritual whose purpose is unknown beyond the phrase "commune with Tiamat." He has numerous kobolds, dragon-blooded Hobgoblins, and several drakes in his employ.