My journey started before the major worlds were even born, almost 100.000 years ago.
Back then, I was still living on earth with my family in the early 20th century. I was born and raised in germany, but had a hebrew lineage. My family was very devout and strict about the teachings of the church, so I didn't really have a nice childhood.
I wouldn't call myself a loner though, because I interacted with the other kids at the synagogue, but I just couldn't bring myself to call them friends. I just felt like I was... different, although not in a special, more superior to others way. I just couldn't connect to them, couldn't understand what they were doing. If I had to describe it, then it would be me being emotionally disconnected, maybe. I never felt a special connection to anyone, not even my parents, and I never had a lover as well. I don't know how to describe it, really. I've just been thinking more rational then others, and so that's why they typically avoided me, if it wasn't for some work or project we had to do together.
Then, around the time I turned 40, I don't remember when, exactly, I died. I died in one of the concentration camps the nazis erected. It wasn't a really meaningful death, really. I was just one of the many million victims, and I didn't even have anyone to mourn my death, not that I really cared, really. I thought I'd just die and then sleep peacefully for the rest of eternity. I never really had a problem with death anyway, so it arriving a few years early didn't mean much to me.
Surprisingly, though, I was reborn, as a newborn baby in an underdeveloped world. As I later learned, it was just one of many. What was special about this world was the use of mana, a natural energy that could be used to influence reality, or when used at an extreme level of mastery, even complety alter it.
Well, it would be more appropriate to say that the world I lived in before my reincarnation was actually the one that was special, because virtually every other world had mana. My previous life's world probably also had mana when it was born, but then later became disconnected from the source, so mana stopped forming.
Either way, the journey in my new world was a hard and treacherous one. I had many one sleepless night and battles to the death, but I eventually rose to the very top of the pecking order, not just in that world, but the whole of the three realms. I conquered and unified the three realms and was living a relatively carefree live.
My only problem was that I had taken a pretty violent approach of unifying the three realms and so my rule was rather shaky. I was just lucky that I was so powerful everyone was afraid to attack me, but that didn't last forever. Eventually, my subjects rose ub against me and planned a coup d'etat. I could have probably forcibly solved it and killed everyone that wanted me dead, but that would've just repeated the cycle of rebellion, so I decided to take another route.
I chose to reincarnate again, but if I wanted to do that, I'd need to seal a good chunk of my memories, because there are extremly powerful beings that will hunt you down if you know of their existence before you're strong enough. The only ones I could have were probably the ones of my first life and the beginning of my second, to somewhere around 800 years, before I ventured forth into the three realms.
That was a problem in and of itself though. If I was to reincarnate again, I'd want to live a nice and peacefull life on one of the worlds, where I would be strong enough to do anything I wanted, without getting attention from the major powers. I should probably seal my abilities too, since they would take too much of a strain on a newborn baby, but I would let the memories of my enlightenment and training be more easily unsealable, so I won't have to train for another 1.000 years to be strong enough. It should look just like monstrous talent, with a few legacies hidden in that world that I'd definitely find. But just in case, I shouldn't complety delete my memories and abilities, so as to save myself should the situation arise. Or maybe I should split my consciousness and watch as the other me lives a carefree live? Yeah, that's a good idea. I'd be able to give him a few tips and gain control over the body if the need arises too. Well, now that I've made up my mind, I should start...