Cuzhou, General of Autumn

Vigilance, first strike, protection from black
Whenever Cuzhou, General of Autumn attacks, look at the top six cards of your library. You may put a Rebel permanent card from among them onto the battlefield. If that card is a creature card, it enters tapped and attacking. Put the rest
on the bottom of your library in any order. At the beginning of the next end step, if that permanent's mana value is l