Keene is the go-to commander for a deck trying to win with Maze's End
Apart from the 6 basic lands, a Commander deck cannot contain duplicate cards and in the choice of cards for the deck you are also limited to the colors of your Commander
However, this card is the most valuable by far, and is likely to retain its spot as the best Prize Pack card of all time.
As much as some of the X spells and sorceries are attractive options, they dont really help with our overall strategy, which is now to draw into our combo or swarm with deathtouch tokens
In a format like Modern that's built around fetch lands and shock lands and where you start with 20 life, spending somewhere between one and six life a turn seems risky, and it is pretty slow
There's really only one takeaway from this, and that takeaway is prices of Final Fantasy sealed product, and specifically Final Fantasy collector booster boxes, are just way too high to be opening right now. As a comparison about price points, consider that you can get all four of the Final Fantasy Commander precons for around $400 at the time of writing so you could but all four Precons, and a couple of Play Booster Boxes, and spend roughly the same as just one single Collector Booster box