Dark Catapulter (DR04-EN013) [Dark Revelation Volume 4]

During your Standby Phase, if this card is in Defense Position, put 1 counter on this card. Remove from play a number of card(s) in your Graveyard equal to the number of counters on this card to destroy that same number of Spell or Trap Card(s) on the field. Then remove all counter(s) from this card.