Alter Ego's for MTU (http://entertainment.upperdeck.com/vs/en/organizedplay/tournament/alterego/default.aspx)
Adding another dimension to the game are the Alter Ego's. They're set specific, so you can only play them using cards from their specific expansion, but each gives you a different starting endurance total, and a continuous ability.
Example:
Dr Octopus Alter Ego - you only start with 35 Endurance, BUT you draw an extra card every draw phase.
Hulk Alter Ego - only one of your characters can attack every turn, BUT you start with 75 endurance.
Discuss.