At the beginning of your upkeep, put a muster counter on Assemble the Legion. Then put a 1/1 red and white Soldier creature token with haste onto the battlefield for each muster counter on Assemble the Legion.
Aurelia's Fury deals X damage divided as you choose among any number of target creatures and/or players. Tap each creature dealt damage this way. Players dealt damage this way can't cast noncreature spells this turn.