In a deck packed with many cantrips and countermagic, the Regent comes down as quickly as turn three and is extremely difficult to interact with, making them the perfect build around in a format with such a deep card pool as Modern
Nice and simple, it exiles the target creature
They feel powerful and useful without getting too broken like some previous Commander cards did
Krovikan Horror has an effect that's been since discontinued, where it cares about the order of cards (notice that it says a summon/creature card directly above it) in your graveyard, something that's a bit difficult to keep track of in a real game
As long as Ozai, the Phoenix King is on the battlefield, you'll keep unspent mana as steps and phases end (although it will become red)
From gravity-defying acrobatics to jaw-dropping feats of strength and agility, every act is set to a modern soundtrack of beloved Christmas classics