A more seller-friendly return window was recently introduced (just 3 days)
Even the cards are different, to some degree
Knowing that Pidgeot ex's Quick Search ability can only be used once each turn, even if you have multiple copies in play, will help you plan out your turns more efficiently so you're not accidentally breaking any rules or cutting yourself off from different lines of play
9 Sachi, Daughter Of Seshiro An interesting dual-type commander, Sachi provides support to both Snakes and Shamans, though not necessarily in equal measure
Its inevitably a bit of fudge but that is half the fun of a crossover What powers your deck in Magic: The Gathering are Land cards, and this includes some stunning examples of terrain from the 40K universe, such as Crumbling Necropolis, Arcane Sanctum (home to the Emperor), and Choked Estuary