Alf Layla wa-Layla (アルフ・ライラ・ワ・ライラ Arufu Raira wa Raira?) is the final boss in Sonic and the Secret Rings. He is an incomplete, twisted genie demon, and the transformed form of Erazor Djinn, created when Erazor absorbed the World Rings when their power was not under his full control. In order to fully complete his transformation, he intends to sacrifice Sonic the Hedgehog, who collected the seven World Rings in the first place. Sonic battles him, having used the World Rings of Hatred, Sadness, and Rage to transform into Darkspine Sonic.