1Jirina, Dauntless General
Instead of tossing coins, you spin a ball in a roulette-like tumbler that lands in either heads or tails
Yuma creating tokens whenever a desert enters the graveyard from any zone opens the door to synergies with cards like Demand Answers and The Mending of Dominaria that dont rely on sacrificing lands
Inti, Seneschal of the Suns a personal favorite, but cards like Monument to Endurance and Containment Construct are just as useful
Timesifter Free extra turns anyone
A new card type, inspired by Final Fantasy summons like Shiva, enters the game with a lore counter, gives an instant effect, and stays for a few turns before vanishing, copying the short but strong nature of summons