The power to travel to anywhere in the Multiverse, but you must make a unique identity for each dimension you go(so you'd have to make a new person if you went to MLP:FIM generation five, and a different one for generation four, one for the Doctor Who Universe, etc), and you can never be a character already named in the canon of that universe if said universe has such a thing.(this means you are thus always an "OC", and never can be someone such as "The Doctor" from Doctor Who, even though the Multiverse Theory kind of states that somewhere out there you are, and technically have been an infinite amount of times)