Omen

Omen is an unreleased champion that was left in the development stage by Riot Games.

Omen is a four-legged demon-like creature. He is a cancelled champion that eventually made way for. The cancellation of Omen was the cause of the eventual V1.0.0.125 delay since Riot had to push up the release. It is said that Omen is not completely removed, but shelved for the moment until they can make him fully desirable by all Riot Staff members, as only 50% supported his release at the time.

Trivia

 * This wikia page lead to a long discussion with over 60 Riot employee replies on the North American League of Legends forum on the reasons why Omen was canceled.