User blog comment:Menara/The Mark of Athena Character Art Revealed!/@comment-125.164.88.169-20120904080727/@comment-4093491-20120904150207

He was accidently killed by his wife Dejanira, who gave him shirt drenched in centaur blood. Which brings a question to my mind, how come Pheobe survived through this in The Titan's Curse?