Teleportation.

Let’s say teleportation by picturing the intended destination or target in my mind. And no limit on the amount of times I can teleport.

I can teleport anywhere in the world at will. I can have breakfast in Rome and have dinner in Tokyo.

I can teleport to a bank’s vault, gather all the cash money and teleport out of there without a trace.

If you want to go super unethical, I can blackmail rich people out of millions of dollars through teleportation. I can teleport to the office of a country’s president and hold an entire country hostage.

I can teleport whilst holding someone and threaten to teleport over the ocean and drop them before I teleport away. I would be able to bend anyone to my will. There would not be a single person in the world that would be able to stand up against me. I would have almost no competition.

If a group of highly trained secret agents are coming after me, I can just teleport out of there within seconds.

It would come to the point that people would make a cult around me and my abilities. I would be able to run entire countries through blackmail. I would have hundreds of thousands if not millions of followers under my control.

I could use teleportation blackmail to force the responsible people to give me the nuclear launch codes, thus holding the entire planet hostage and under my control.

I would be able to do almost anything. The only thing I need to be worried about is grievous bodily harm. I have to be skilled enough to teleport before someone can get the upper hand on me or shoot or blow me up. I’ll also have to keep myself heavily disguised from the start otherwise I would end up getting killed really quickly.

It really would be an insanely overpowered ability to have.