Professor Oak's New Theory (101/123) (League Promo) [HeartGold & SoulSilver: Base Set] Legendary Artifact Creature where X is the number

where X is the number of colors among those creatures

Set: Summer Magic / Edgar Type: Creature — Shapeshifter Rarity: Uncommon Cost: {3}{U} You may have Clone enter the battlefield as a copy of any creature on the battlefield

Set: Champs and States Type: Creature — Elemental Rarity: Rare Cost: {G}{G}{G} Trample

Set: Summer Magic / Edgar Type: Sorcery Rarity: Uncommon Cost: {G}{G} Until end of turn

"Her hunger knows no limit

Professor Oak's New Theory (101/123) (League Promo) [HeartGold & SoulSilver: Base Set] Legendary Artifact Creature where X is the numberSet: HeartGold & SoulSilver: Base Set Type: Supporter Rarity: Promo