For 10 points, name this husband of Isis and father of Horus, the Egyptian god of the underworld.
This deity was combined with Apis to create the syncretic god Serapis. The oldest son of Geb and Nut, this god had an affair with Nephthys that led to the birth of Anubis. This god was killed when he was tricked into entering a coffin, after which it was thrown into the Nile. Later, this man's brother dismembered him and spread the pieces around Egypt. He was reassembled by his wife, the goddess of magic, who resurrected him for a long enough time to conceive a son. For 10 points, name this husband of Isis and father of Horus, the Egyptian god of the underworld.
This deity was combined with Apis to create the syncretic god Serapis.
{Osiris}