Gyarados (6/102) [Base Set Shadowless Unlimited] Eternal Duelist Soul you can reveal that monster

you can reveal that monster to Special Summon it

Set: XY: Flashfire Type: Psychic Rarity: Uncommon Retreat cost: Colorless

When this face-up card is destroyed by battle and sent to the Graveyard

If this card in its owner's Spell & Trap Zone is destroyed by an opponent's card effect: You can Special Summon 1 "Magician of Black Chaos" or "Dark Magician of Chaos" from your Deck

Set: Cybernetic Revolution Card type: Fusion/Effect Monster Rarity: Ultimate Rare Attack:

Gyarados (6/102) [Base Set Shadowless Unlimited] Eternal Duelist Soul you can reveal that monsterSet: Base Set Shadowless Unlimited Type: Water Rarity: Holo Rare Retreat cost: Colorless,Colorless,Colorless