Junk Berserker

"Junk Synchron" + 1 or more non-Tuner monstersYou can banish 1 "Junk" monster from your Graveyard, then target 1 face-up monster your opponent controls; that target loses ATK equal to the banished monster's ATK. At the start of the Damage Step, if this card attacks a Defense Position monster: Destroy that monster.