An evildoer from an alternate timeline, exiled from my own universe for my wrong doings.

My amnesia has been killing me. I'm struggling to scrap together any detail material from my real home. (1/2)

(2/2) Yes, I remember committing a catastrophe so grim, so dreadful, that I was expelled out my own universe for the harm I caused amongst the world. But when it comes to the disaster itself, or any reasoning behind it, my brain is left thoughtless.