Equalist Conscription

Bestow {3}{b}{b}{b}
Enchanted creature and Equalist Conscription
each get +1/+1 for each Rebel you control.
At the beginning of your end step, amass 1, then
amass 1, then amass 1. (Put a +1/+1 counter on a
Rebel you control. If you don't control one, create a
0/0 black Rebel creature token first).