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The world that denies thee, thou inhabit. The peace that ignores thee, thou corrupt. Chaos. As ever, I am your faithful, degenerate son..
―Ethan Raynes[src]

The Ritual of Janus was a ritual performed by Ethan Rayne on Halloween of 1997 to curse everyone who bought a costume at his costume shop to transform into whatever the costume was. It only affected costumes from his shop and required a ritual with a statue of Janus to be performed. The spell could only be broken by breaking the statue. After Rupert Giles physically persuaded Ethan to tell him what to do, he smashed the statue and broke the spell.