Having a way to combo off and generate absurd amounts of mana in the command zone that also has a win condition stapled to it is firmly in the high end of Bracket 3 or just straight up Bracket 4 or higher, based on the cards you end up including in the deck
Golgari Yawgmoth (5 players): Golgari Yawgmoth, similar to its Modern counterpart, combines undying creatures and Yawgmoth, Thran Physician to generate card advantage and achieve infinite combos
If you have a 2/2, a 2/3, a 3/3, a 3/4, and a 5/5, then abilities with coven will work since you do have three different power values on the board
In fairness, a Dark Tera Type could offer more storytelling potential
I like this best in a battlecruiser-heavy meta where you know youll have lots of juicy targets