Harpie's Pet Dragon (Forbidden Memories) [FMR-002] Prismatic Secret Rare Common when it declares an attack:

when it declares an attack: You can change the battle positions of as many monsters your opponent controls as possible

Set: Dark Beginning 1 Card type: Equip Spell Rarity: Super Rare Attack: 0 Defense: 0 Pay 800 Life Points

or monsters

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

banish all cards your opponent controls and in their GY

Harpie's Pet Dragon (Forbidden Memories) [FMR-002] Prismatic Secret Rare Common when it declares an attack:Set: Video Game Promotional Cards Card type: Effect Monster Rarity: Prismatic Secret Rare Attack: 2000 Defense: 2500 Increases the ATK and DEF of this card by 300 points for each face up "Harpie Lady" on the field.