Kamen Rider Wizard

The Ring of Kamen Rider (仮面ライダーの指輪 ) (1x52)

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Haruto is lost in a parallel world where it is inhabited by monsters created by an entity called Amadam and he wants to steal the powers of the Kamen Riders for himself. Using the Legend Rider Rings, he will summon 13 Heisei Kamen Riders.