To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of The Fire Crystal's first ability)
Mostly, though, this deck relies on the raw card quality from this color pair, particularly the commons
There will be players who are highly uncomfortable with this sort of thing, but for those who are onboard with the craziness, this is a very flavorful card with a very cool ability
Opponents can usually sniff out which battalion creature to remove before it has a chance to attack, but Legion Loyalist attacks the turn it hits the field, hopefully with a boardstate thatll allow you to trigger its effect
You get to combine two effects: fight and proliferate
\_(?)_/ One thing Jace doesn't do, as only a rare Planeswalker, is protect himself