Vylon Prism (SDLI-EN019) - Structure Deck: Realm of Light (2020 Date Reprint) Unlimited

If this card is sent from the Monster Card Zone to the Graveyard: You can pay 500 Life Points, then 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.