Professor Oak's New Theory (101/123) (League Promo) [HeartGold & SoulSilver: Base Set] XYZ/Effect Set: Champion Pack 3 Card

Set: Champion Pack 3 Card type: Effect Monster Rarity: Super Rare Attack: 1200 Defense: 2000 FLIP: Special Summon 1 "Gravekeeper's" monster with 1500 or less ATK from you Deck

If there are 5 different "Forbidden One" cards in your Graveyard that were sent there by this card's effect

When this card is Fusion Summoned: Target 1 face-up monster your opponent controls

if this card is the only monster on your side of the field

When you do: Add 1 Level 4 or lower "Mermail" monster from your Deck to your hand

Professor Oak's New Theory (101/123) (League Promo) [HeartGold & SoulSilver: Base Set] XYZ/Effect Set: Champion Pack 3 CardSet: HeartGold & SoulSilver: Base Set Type: Supporter Rarity: Promo