I do like this idea. I have been thinking for awhile now that the Illithid made some sort of demonic bargain to create the tadpoles but I could not theory craft what there end goal might be. That could explain why they went into Avernus to make a deal so that they could rise back into power. I do have some question of there motives, not every god would want to help them. Maybe they are trying to create an avatar for there god Ilsensine?
