Maarselok is a Dragon located in Lair of Maarselok (Elder Scrolls Online) His influence corrupts the Green, as he is imbued with a mysterious disease known as the Azure Blight. Maarselok seeks to corrupt Selene, a Changeling with close ties to Shagrath, so that he could shape the world to his liking with her powers.

For centuries, Maarselok slept deep in the mountains between Elsweyr and Grahtwood. However, upon the opening of the Halls of Colossus, this monstrous Dragon has awoken as a consequence of the release of his brethren. Hungry and vengeful, Maarselok has ravaged the wilds and now threatens to spread his corruption into the domain of Valenwood, risking the infection of the Elden Tree if left unchecked