After dying Jacob is given one wish for his new life, he wishes that every time he dies he is reborn in a new world with a random ability e.g. being an earthbender, a system shop, enhanced memory, etc. Upon his death he will lose all gained abilities only keeping his experience for the next world.
Author Notes: I have a couple worlds and powers in mind, Attack on Titan, Avatar the Last Airbender, Omnitrix, Steven Universe. But I would love suggestions from the readers, afterall i'm sure there are many intresting powers and world Jacob could explore.