Ground Erosion





''After activation, for as many turns as this card has been face up on the field, place 1 "Turn Counter" on this card. Send this card to the Graveyard to reduce the ATK of a monster on the field by 500 x the number of Turn Counters on this card. If that monster is an Effect Monster, its effects are negated as long as it remains face-up on the field. ''

Rulings

 * This card does not effect monsters whose effects involve immunity to trap cards.