There are exceptions for supplementary, reprint, or collector sets, which can come with two to four depending on the set and style
You can't choose to pay any additional costs for a copied spell
Counter Blitz Counter Blitz Tidus helms this Final Fantasy X deck , and its now easier than ever to get hold of (it's now under MSRP, but you can also buy a bundle of all four Final Fantasy decks for just $184.99 right now, at the equivalent of $46.25 per deck)
There arent a lot of cards from this deck that I see making much of an impact in Commander aside from that
A non-foil source material card appears in 1 of every 26 Play Boosters
After making four wildly popular Warhammer 40,000 Commander decks last year, Magic: The Gathering is giving the same love to Doctor Who