Traitor to all Crowkind

+1: Create a 1/1 flying Blue crow token with: sacrifice this creature, add one mana of any color to your pool used only to cast a commander.
-3: All players returns each commander they control from the battlefield to the command zones.
-7: You get emblem:When your commander enters the command zone, name a creature as long as your commander is in play the named creature can't be cast