This is my commander cube. For the most part, normal commander rules apply with some alterations:

-All mono-colored commanders have "Partner with legendary creatures of the same color identity".

-All mono-colored commanders have "Choose a background".

-You may add up to one background in your sideboard's color to your deck's
color identity as long as your color identity doesn't exceed three colors.

Pathway Arrows and Shard of Broken Glass represent custom conspiracies; Mass of the many and Royalty respectively.
https://mtgcardsmith.com/view/mass-of-the-many-2?list=user
https://mtgcardsmith.com/view/royalty-5?list=user

The two major themes are counters and tokens with different archetypes synergising, for example, Boss's Chauffeur. It synergises with blink, aristocrat, token and counters decks.