Clytius

"I devour magic. I destroy the voice and the soul. You cannot oppose me."

- Clytius to Hazel Levesque

Clytius is a giant created by Gaea to absorb and defeat all of Hecate's magic. He is also one of the antagonists in The House of Hades.

History
During the first Gigantomachy, Clytius was created to absorb all of Hecate's magical abilities. However he was defeated when Heracles, Dionysus, and Hecate worked together to defeat him, with Hecate lightning his hair on fire as the finishing blow.