(Not necessary to read the prequel. It's more like flavor text.)

He is older than many stars in the galaxy, and yet he endures the torture. Many times he has tried, and every time he has failed. Every timeline he visited suffered the same fate under different circumstances. All to help 'his' kind defeat the one enemy nopony has managed thus far in any timeline. With technology that seemingly defies the laws of physics and resembles magic to many, the Weary Traveler is determined to help 'his kind' push forward.

In the wake of this, the princesses and the Elements of Harmony are thrust between two worlds completely alien to them and have to make a decision on how to carefully approach this...pony. His offers are confusing, leaving Celestia as the sole decider for the potential future of not just her ponies, but the rest of the world. How is a pony to decide for the whims of what could be seen as a god by many?

This is his fifty-eighth try.