User blog comment:Darkest Shadow/PianoPoll~!/@comment-4988763-20161009191659

All-time power would be either planeswalking or dream manipulation for me.

In the former, you could be in whatever kind of fantasy world you desire. However, you would be exposed to many actual dangers and things would be unpredictable. In the end, you would still be you, and you would have to earn your rewards by exploring those kinds of worlds.

In the latter, you could do anything, meet anyone, and be almost anywhere without real-life repercussion. You would be the one creating different scenarios to be in. In addition, you would be able to spend days or even months inside one night's sleep and whatever happens remains in the dream. The only catch is that, since it is a dream, things will eventually get predictable.