Sources: Player's Handbook
Vecna, the god of secrets, is neutral evil. He is known as the Maimed Lord, the Whispered One, and the Master of All That Is Secret and Hidden. Vecna rules that which is not meant to be known and that which people wish to keep secret.
The domains he is associated with are Evil, Knowledge, and Magic. He usually appears as a lich who is missing his left hand and left eye. He lost his hand and eye in a fight with his traitorous lieutenant, Kas. Vecna’s favored weapon is the dagger.