Ouroboros

Ouroboros is Shiina's inner Phantom trying to make its way out after he was driven into despair until Wizard and Beast destroy them via their Phantoms.

Profile

 * Gate: Shiina (Gate spawner)
 * Destroyed by: Kamen Rider Wizard's Strike End and Kamen Rider Beast's Biting End
 * Mythological Basis: Ouroboros