Youre putting it into play, meaning Hellkite Coursers effect will not increase Command Tax, no matter if its already costing you tax, or if youve never actually cast your Commander yet this game
Carmine SIR The standout trainer card of the set
In my years of personal experience, examining good decklists, and talking to people much smarter than me, 50 mana sources is about the right number for most decks to shoot for, usually 37 lands and 13 ramp sources for a general budget deck
Any Jace that has not used an ability yet can start proliferating
I'm no licensing expert by any stretch of the imagination, but I'd have to imagine there could still be issues based on that fact and the original card name alone
Put your Main and Extra Decks in the right spots, then choose who goes first via a coin flip or whatever other method you choose