Barrage Blast

Once per turn, you can detach any number of materials from Machine Xyz Monsters you control, then target that many cards on the field; destroy them. If a Machine Xyz Monster(s) you control is destroyed by battle or an opponent's card effect while this card is in your GY: You can banish this card and 1 Machine Xyz Monster from your GY; inflict damage to your opponent equal to the banished monster's Rank x 200.