Duo Shift lets a dual named character shift on top of two separate characters at once, one for each half of the name, as seen on Mickey Mouse & Minnie Mouse Adventuring Duo
While this card is on the table, if the rest of your deck is doing what it's supposed to be doing, you can essentially stop your opponent from having a viable win condition
While at first glance this looks like your average four mana clone, pretty interchangeable with any number of blue cards for EDH players who want this effect, it's actually a fair bit better than most
Karona, False God Karona, False God is like a group hug 5-color commander
The Crystals depicted on the MTG crossover cards are specifically from Final Fantasy III , which featured a timeline where the four elemental crystals all had dark counterparts (represented solely by The Darkness Crystal)
Morph can be used to Shift any character, giving decks that run Emerald a huge advantage