The Caretaker understands that you must be homesick. Everyone gets like that. To better suit you, the Caretaker has opened a portal in your home world! Maybe. You see, there's a problem with the portal; it randomly selects worlds to go to. One week you may be dealing with creatures that battle each other by command of their trainers, another you may be slaying dragons in a world where pandas talk to you.

Whatever world the portal picks will be locked in place for a week, after that, it chooses another place to open. Powers are authorized beyond this portal, although world-breaking abilities may fizz out at the most inopportune moments. In fact, many powers have a 50/50 chance of working properly or reacting in a way that's unexpected.