FenHarel

“When did I say that I would save you?” ―Fen'Harel

In ancient times, only Fen'Harel could walk without fear among both our gods and the Forgotten Ones, for although he is kin to the gods of the People, the Forgotten Ones knew of his cunning ways and saw him as one of their own. And that is how Fen'Harel tricked them. Our gods saw him as a brother, and they trusted him when he said that they must keep to the heavens while he arranged a truce. And the Forgotten Ones trusted him also when he said he would arrange for the defeat of our gods, if only the Forgotten Ones would return to the abyss for a time. They trusted Fen'Harel, and they were all of them betrayed. And FenHarel sealed them away so they could never again walk among the People.
—From Codex entry: Fen'Harel: The Dread Wolf

Fen'Harel , the elven god of betrayal (or god of rebellion) is also known as the Dread Wolf, He Who Hunts Alone, Lord of Tricksters, The Great Wolf, Roamer of the Beyond, and Bringer of Nightmares. He was known as kin to both the Creators and the Forgotten Ones. His supposed betrayal of both clans of gods by sealing them away in their respective realms, never again to interact with the mortal world, is sometimes used to explain why the elven gods--particularly the benevolent Creators--did not intervene to prevent the fall of Arlathan. Indeed, Fen'Harel has allegedly never been fond of the elven people and is said to have spent centuries in a far corner of the earth after his great deception, hugging himself and giggling madly in glee.


(all info from the Dragon Age Wiki)