The set itself explores the fall of planes in the Magic: The Gathering Multiverse to the Phyrexian invasion
That's when her second 7-power matters ability kicks in: If you manage to connect with her (or any other 7/x creature), then: You get to untap all your creatures, and If this was your first attack, then you get an extra attack per damaged player
Once we knew Amonkhet was returning split cards to the Standard stage, we determined that it was time to simplify split cards
If you bring a creature to the battlefield during the opponent's turn (for example, Teferi Mage of Zhalfir), and the cunning opponent phase it out, Teferi will phase in at the beginning of your untap step, and you can attack with it during the same turn
When you increase your deck size, you lower your chances of drawing your best cards
I take the list of cards it generates, and extract information about the color and rarity of each card idea, and use an algorithm to create a balanced MTG set that includes an equal number of each of the 5 colors (plus some colorless and multicolored cards)