So I found an amusing little combo (which, admittedly has been around since Kaldheim came out).
Fireblade Charger + Sword of the Realm. For three mana, you can repeatedly swing with a 3/1 that can kill most things that don't have a 7 butt or more. It gets more absurd when you have Bruenor Battlehammer, Fighter class, and other random equipment with equip costs of 2 or less (or greater, assuming multiple Fighter classes.) I'm contemplating making a historic deck based around the combo, but I'm having trouble deciding if I want to stick to Boros (for efficiency) or go Mardu (for extra creatures dying/leaving the grave support).