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
This iteration is a Judge Gift Card from 2018
The B Cube was the only other cube I have managed to successfully run alongside my main cube and played interchangeably
Likely Black or Red would be the best colors for it, but blue has affinity and animate artifact effects that this works with
I like this best in a battlecruiser-heavy meta where you know youll have lots of juicy targets
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