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[Card Name] Reshef the Dark Being [Type] Ritual/Effect Monster [Attribute] LIGHT [Sub Type] Fiend [ATK] 2500 [DEF] 1500 [Card Text] 
This card can only be Ritual Summoned with the Ritual Spell Card, "Final Ritual of the Ancients". Discard 1 Spell Card from your hand. Take control of 1 monster on your opponent's side of the field until the End Phase. You can only use this effect once per turn.
Yu-Gi-Oh! Level 8 Monsters - Yu-Gi-Oh! Card Guide
Card Text