2 monsters, including a “Scrap” monster
During your Main Phase: You can target 1 "Scrap" monster in your GY: Special Summon it, then destroy 1 card on your field. If a "Scrap" monster(s) you control is destroyed by a card effect: Special Summon 1 "Scrap" monster from your Deck, then destroy 1 card on the field. You can only use each effect of "Scrap Wyvern" once per turn.
