To have two commanders, both must have the partner ability or corresponding "partner with" abilities as the game begins
And, of course, you can imagine how evil this is with Kiki-Jiki, Mirror Breaker, or Freed from the Real and any permanent that taps for blue and at least one extra mana
The deck has two main goals: to build a large army of human creatures, and to pump the army of humans through dozens of anthem and +1/+1 counter effects, allowing you to attack with a massive army of huge creatures
Top white common: Realmbreaker's Grasp A two manner pacifism effect that shuts down abilities is pretty standard now, but certainly still solid, and Realmbreaker's Grasp likely deserves its pick position of 4.0
Your pretty close, couple more cuts and your there