The Descention to Oblivion
A mighty sea hydra, an enemy of the god Mystarios.
Vizerv has the largest hoard of treasure in the world. He has never failed to guard it until now. The demigod Mystarios managed to defeat him and take the Helm of Infinite Might to become a god. Vizerv swore vengeance and is gathering all the dragons and as many dragonborn as he can