Copycat [JUMP-EN020] Ultra Rare 54 You can only activate 1

You can only activate 1 "Bond Between Teacher and Student" per turn

Set: EX: Sandstorm Type: Water Rarity: Common Retreat cost: Colorless

Set: Nintendo: Black Star Promos Type: Water Rarity: Black Star Promo Retreat cost: Colorless

Set: POP Series 1 Type: Darkness Rarity: Uncommon Retreat cost: Colorless

except "Thunder Dragon Titan" (in which case you do not use "Polymerization")

Copycat [JUMP-EN020] Ultra Rare 54 You can only activate 1Set: Shonen Jump Magazine Promos Card type: Effect Monster Rarity: Ultra Rare When this card is Summoned, select 1 monster your opponent controls. This card's ATK and DEF become equal to the selected monster's original ATK and DEF.