You can Special Summon this card (from your hand) by Tributing 2 monsters with 2000 or more ATK. During either player's Battle Step, when this card battles an opponent's monster: You can banish that monster and this card. Return the banished monsters to the field at the end of the Battle Phase. If the monster banished by this effect was an Xyz Monster: This card gains 500 ATK for each Xyz Material that monster had attached to it when it was banished.