Junk Warrior/Assault Mode

“Cannot be Normal Summoned/Set. Must be Special Summoned with "Assault Mode Activate". Gains 1000 ATK for each "/Assault Mode" monster you control, also if this card battles a monster, any battle damage it inflicts to your opponent is doubled. Unaffected by your opponent's activated monster effects. If this card is destroyed: You can target 1 "Junk Warrior" in your GY; return it to the Extra Deck, then you can Special Summon it (this is treated as a Synchro Summon).”