Red Exocrine This one is another sleeper card that looks mid on the surface but can become an absolute bomb under the right circumstances
That's a pretty hefty tax in most decks, and you'll probably need some white mana ramp cards to help pay for it
Highly regarded for its penchant for drawing cards and its instant speed shenanigans, mono-blue is often noted as a great color option for control decks in Magic: The Gathering
By being Jeskai, which is mainly Blue-White with a red splash, you also have a cleaner manabase and your three drops, like Narset, Parter of Veils and Teferi, Time Raveler, are better suited against combo decks and control mirrors
Pair this with Multani, Maro-Sorcerer for some enjoyable shenanigans
Your basic 5/5 dragon will start clocking for 15 damage every time its in combat