Yawgmoth, Thran Physician Representing one of the biggest villains in MTG history, Yawgmoth is so terrifying that he has a Modern deck built around him
That's a deck about getting just a bunch of characters out and just Questing [gaining points] really fast Emerald & Ruby is really, I think, the most strategically complex of the three
As for other formats, no other tabletop format was touched, but a couple minor changes to MTG Arena-only formats were announced
Noctis, Prince of Lucis No amount of costs are enough to make Noctis, Prince of Lucis fair
At the top of my mono-color uncommon rankings sit Environmental Scientist, Matterbending Mage, and Foolish Fate
Ill entertain arguments both for and against Delay being a hard counter, as that spell, technically, is coming back at some point, and if it's a creature itll be even more threatening because of haste