King of the Skull Servants (TU04-EN016) - Turbo Pack: Booster Four Unlimited

The original ATK of this card becomes the number of "King of the Skull Servants" and "Skull Servant" cards in your Graveyard x 1000. When this card is destroyed by battle and sent to the Graveyard, by removing from play 1 other "King of the Skull Servants" or "Skull Servant" card in your Graveyard, Special Summon this card.