The Doors of Oerth
An ancient green dragon who makes its lair on Fireshriek Ilse. While openly disdainful of creatures it considers lesser then itself, Tyranthraxus is not openly hostile. It is however increasingly weary of anyone it suspects of being a pawn of the Ancient Black Umbraregeia.
Anyone coming to the island is threatened and told to bring the Gatekeeper to the island. As to who or what the Gatekeeper is unknown and as for Tyranthraxus’ plans for the Gatekeeper, those are unknown as well.