Mai, Scornful Striker might be sideboard material at best, but I expect it to matter a ton against spell-based matchups
But the real fun starts at the beginning of combat, when Ardyn lets you exile a creature from any graveyard and bring it back as a 5/5 black demon token
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Facilier Charlatan (2X) Flotsam Ursalas Spy (1X) Jafar Wicked Sorcerer (2X) Jetsam Ursalas Spy (2X) Magic Broom Bucket Brigade (3X) Maleficent Sorceress (2X) Mickey Mouse Wayward Sorcerer (Foil 1X) Olaf Friendly Snowman (3X) Pascal Rapunzels Companion (2X) Rafiki Mysterious Sage (3X) Sven Official Ice Deliverer (1X) The Wardrobe Belles Confidant (3X) Yzma Alchemist (2X) Friends on the Other Side (3X) Disney Lorcana The First Chapter, Sapphire & Steel Starter Deck Contents: Sapphire Cards Aurora Briar Rose (3X) Aurora Dreaming Guardian (Foil 1X) Aurora Regal Princess (3X) Flounder Voice of Reason (2X) Gramma Tala Storyteller (2X) Jasmine Disguised (2X) Maleficent Sinister Visitor (3X) Maleficent Uninvited (1X) Mickey Mouse Detective (1X) Mufasa King of the Pride Lands (2X) Scar Mastermind (1X) Develop Your Brain (3X) One Jump Ahead (2X) Coconut Basket (3X) Magic Golden Flower (2X) Steel Cards Beast Hardheaded (2X) Captain Hook Forceful Duelist (3X) Goons Maleficents Underlings (2X) Hercules True Hero (2X) Kristoff Official Ice Master (2X) Maui Demigod (1X) Prince Eric Dashing and Brave (2X) Simba Returned King (Foil 1X) Simba Rightful Heir (2X) Fire the Cannons

However, if you have a bunch of one-drop creatures in white, green, or red, you can really hurt your ability to curve out if too many of your lands enter the battlefield tapped