Superheavy Samurai Soulfire Suit (DUEA-ENDE3) Super Rare

You can target 1 "Superheavy Samurai" monster you control; equip this monster from your hand or your side of the field to that target. Its Level becomes 5. During either player's turn: You can discard this card, then target 1 Defense Position "Superheavy Samurai" monster you control; until the end of this turn, it loses 800 DEF, but cannot be destroyed by battle or by card effects.