Shadowreaver Knight 21 (Ultra Rare) [BLGG-EN046-UR]

1 Tuner + 1+ non-Tuners
Cannot be destroyed by battle. Each time a card(s) is placed in your opponent's Spell & Trap Zone: Excavate the top cards of your Deck until you excavate a monster and equip it to this card as an Equip Spell, also place the rest on the bottom of the Deck in any order. Gains ATK/DEF equal to the total Levels of the monsters equipped to it x 300. If the total Levels of monsters equipped to this card are higher than 21, destroy this card.