Vylon Prism (Mosaic Rare) (BP02-EN108) - Battle Pack 2: War of the Giants Unlimited

If this card is sent from the Monster Card Zone to the Graveyard: You can pay 500 Life Points to target 1 face-up monster you control; equip this card to that target. If the equipped monster attacks or is attacked: It gains 1000 ATK during the Damage Step only.