Scrap Factory

“All "Scrap" monsters gain 200 ATK and DEF. When a face-up "Scrap" monster(s) on the field is destroyed by a card effect and sent to the Graveyard (except during the Damage Step): You can Special Summon 1 "Scrap" monster from your Deck. You can only use this effect of "Scrap Factory" once per turn.”