Demogorgon

Demogorgon is a creature of unknown power and provenance that apparently sent help to Hune when called upon in a recent encounter. In response to this call, a creature "resembling a massive, living mushroom monster" stepped through a pink portal that Hune had crafted. We believe these pink portals lead to The Underdark, thus it could follow that Demogorgon is a creature of, or connected to this realm.