Trade Cards Online

Once per turn, depending on the number of spell and trap cards in your spell and trap card zone, you can activate the appropriate effect:
1: Destroy 1 spell or trap card on your opponent’s side of the field.
2: Destroy 2 spell or trap cards on your opponent’s side of the field.
3: Send the top 3 cards of your opponent’s deck to the graveyard.
4+: Increase this cards attack and defense by 1000.