Sky Striker Mobilize - Linkage!
If you control no monsters in your Main Monster Zone: You cannot Special Summon monsters from the Extra Deck for the rest of this turn after this card resolves, except "Sky Striker Ace" monsters, also send 1 other card you control to the GY, and if you do, Special Summon 1 "Sky Striker Ace" monster from your Extra Deck to the Extra Monster Zone, and if you have at least 1 LIGHT and 1 DARK "Sky Striker Ace" monsters on your field and/or in your GY, the Summoned monster gains 1000 ATK.