Scrap Wyvern

2 monsters, including a "Scrap" monster You can target 1 "Scrap" monster in your GY; Special Summon it, then destroy 1 card you control. If another face-up "Scrap" monster is destroyed by card effect, while you control this monster (except during the Damage Step): You can 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.