When the chosen player controls no nontoken permanents of the chosen color, sacrifice Jihad
Boromir, Warden of the Tower is your answer to opponents who cast cards for free, and the creature protection isnt a bad alternative use
If that happens and the Spider-Man set doesn't meet expectations, might the company shift its attitude towards UB, and perhaps be a bit more selective about what properties it chooses to adapt
Colorless is the best option unless you want to get pretty heavy into discard
For example, lets say I play Samite Healer from Fifth Edition , whose creature type is summon cleric. But my deck has human typal synergies, so I need to explain to my opponent that Samite Healer is now also a human
You can play with the Power 9, and even take part in Commander games on the client