But I didn't truly die.
I cheated.
My ego, my sense of self was bound to the fragment I first used. The grimoire that I was able to teleport away during the breakout. Fortunately it safely return to where I first found it. With the fragment of my soul that contains memories stays there.
The cleansing spells will fail to erase me completely. I encoded myself into it the grimoire after all.
So the moment I perished, a sliver of my soul was sealed.
And when a new life was born, my soul will call for its missing piece finally completing it. In this way my memories were completely intact and so my research shall continue again.
However there is something that didn't go as I expected. The duration it take for my reincarnation to happen and the fact that I couldn't which body I would end up with.