Funny thing, Orpheus sometimes uses a tadpole, and sometimes doesn't. If you accept the final tadpole from the emperor, but then instead of transforming, you force him to leave, Orpheus is going to use that tadpole. But if you never accept the tadpole from the emperor, Orpheus is going to turn into a mind flayer without the tadpole (since you don't have any). And there is no explanation provided.
