My initial thought here was that blue would be a good fit
You can force the issue with the activated ability, which combined with an indestructible effect lets you mow through all your opponents' boards
Ramp's sibling in cost reduction means The Darkness Crystal might not belong on the list, but is very welcome for a similar effect, and this card so happens to be a cool way to spend extra mana and get very real benefits
Once activated, this legendary artifact lets a player control another's turn, and the only caveat is that Mindslaver's controller cannot make the other player formally concede the game
Real sideboard cards: You dont have a lot of room in your board when you already have Cunning Wish to work with, but not all hope is lost
This way, you can create a well-tuned and optimized deck that can hold its own in any playgroup