Well, pretty much what the title says. Are you allowed to take your opponent's objects/gold instead of forcing them to lose a life when battling at the Crown of Command?
I believe that the rule book just mentiosn that if more than one character at the Crown of Command then rather than casting the Command spell (one of) the other player(s) must be encountered.
So playing out the rules for encountering you can fight or use one of your abilities against another player and, if you win, take followers, objects, life etc.
