Sinister Serpent [WC4-E002] Prismatic Secret Rare

Set: World Championship 2004: GBA Promo Card type: Effect Monster Rarity: Prismatic Secret Rare Attack: 300 Defense: 250 During your Standby Phase, if this card is in your GY: You can add it to your hand, also banish 1 "Sinister Serpent" from your GY during your opponent's next End Phase. You can only use this effect of "Sinister Serpent" once per turn.