Valkyrion the Magna Warrior (RP02-EN092) [Retro Pack 2]

Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) by Tributing 1 "Alpha The Magnet Warrior", "Beta The Magnet Warrior", and "Gamma The Magnet Warrior" from your hand and/or your side of the field. You can Tribute this card to target 1 "Alpha The Magnet Warrior", "Beta The Magnet Warrior", and "Gamma The Magnet Warrior" in your Graveyard; Special Summon those targets.