The leaders and bases. Fortress Maximus automatically transforms. Pay 1 to recombine. That creature is removed until end of turn. You may not spend more than 3 in this fashion each turn.
Creatures are unaffected by summoning sickness.
The right-hand men. The, er, left-hand men. 1 to reform. All creatures on your side gain First Strike until end of turn if opponent chooses to attack. Low-class, unnamed troops.