They work against mill in a similar fashion: Shuffling your library back into your deck against a mill deck is equivalent to resetting your life total to 20, 40, or whatever against a more standard Magic deck attacking your life total
While these cards will no doubt give the deck a tremendous boost, giving you even more value every time Arna creates tokens, its more than okay to leave them out of a budget build as this Commander can quickly speed toward a win regardless
If you or a friend adore Final Fantasys art and flavor, a bundle gets you a nice chunk of packs to open plus the exclusive land set (and that cool oversized die featuring Final Fantasy iconography)
This is great in Red-centered Spellslinger Brews that cast instant and sorceries to trigger things like Young Pyromancer and Guttersnipe like Izzet, Boros or Jeskai
Producing, at least, five 2/2 tokens, these tokens quickly become a serious threat
Moat, on the other hand, Moat asks nothing of you