Each creature you control gets +1/+1 for each color it shares with your commander's color identity.

{4}{t}: Create a */1 Demigod creature token that is all colors with "This creature's power is equal to your devotion to the colors in your commanders color identity."

{4}{t}: Create a 1/* Demigod creature token that is all colors with "This creature's toughness is equal to your devotion to the colors in your commanders color identity."