Having an instant-speed commander in the command zone is quite nice for a mono-blue deck, and you dont even need to have all that many Moonfolk in your deck to take advantage of that ability
It turns out that there are more than a few creatures that get a lot better when you turn them into artifacts and give them a mana ability, especially if you want to give yourself a repetitive stress injury in your wrist by tapping and untapping Horseshoe Crab, Simic Ragworm, Soliton, or Morphling until they kick you out of the LGS
Maindeck Kor Firewalker might be a great way of hedging your bets in the Burn matchup, but your Infect, Amulet Bloom, and Abzan opponents are just going to laugh their way to the next round
Wizards of the Coast designs mythic rares to carry more impact per card than any other rarity
If you're a collector or a seller, this article could help you pick your next investments