If you like creature based combo decks, Yawgmoth, Thran Physician Combo is probably your best bet in the current Modern metagame
These are Jace, the Mind Sculptor, Liliana of the Dark Realms, Nissa Who Shakes the World and Chatterfang, Squirrel General
Two major gameplay mechanics for Ursulas Return have been revealed so far
Cards like Aetherspouts , Aetherize , Stormkeld Vanguard , Colossal Skyturtle , Return of the Wildspeaker , Rishkars Expertise , Sea Gate Restoration , Whelming Wave , Clone Legion , and Aminatous Augury can all be fun options depending on your build and budget
Magic: The Gathering has specific ways it represents story elements through its gameplay, and I'm happy to see that these mechanics were translated so well to create an authentic-feeling Final Fantasy experience that goes much deeper than Cactuar's 9999 damage ability