Stipulations:
- You cannot die and are immune to disease
- You cannot alter the future such that you change the world from your point of origin. i.e. You cannot become so famous that future people recognize you as immortal.
- If you vary the timeline too much you will cease to exist.
Go to Leningrad, kill Putin parents, die. If still living, go to next city to kill another old fart fucker parents. Fuck this world.