The rising popularity of EDH has driven some of Wizards of the Coast's strategy for Magic: The Gathering 's release schedule and increased frequency of Universes Beyond sets, and "Turtle Power" being packed with practical value could be a way to say "thank you" to the players
Teferi's Protection A three-mana spell that protects you and all your creatures from any kind of damage at instant speed in Commander is pretty ridiculous
Basically, by opening boxes on release day (or release weekend), we can take advantage of the excitement for the new cards (new demand) and the fact that the freshly opened cards haven't had time to reach the market yet (lack of supply)
Corpse Knight, Bastion of Remembrance, Cruel Celebrant, Zulaport Cutthroat, just pick a couple of these because they add a win condition in case an opponent uses Ghostly Prison and friends, or worse, Moat
That means at higher rarities: Cloud, Midgar Mercenary Gilgamesh, Master-at-Arms Firion, Wild Rose Warrior (free 1/1s with job select) Freya Crescent Giott, King of the Dwarves Adelbert Steiner Zidane, Tantalus Thief is also an exceptional card, even without any direct synergy
Getting 4 or 5 mana from his +1 is easy in Commander