I died aged 27 to cancer. Then I was reborn in a South-American state. I retained all memories and skill and had a goal from my previous life I needed to finish, but now I was just a 1-year-old girl capable of only smiling at others.
Dreams like this one make me glad I'm able to wake up from them at will.
Then the upgrades can be Sextillion Degrees, Septillion Degrees, Octillion Degrees, and then finally Kugelblitz, the latter being a black hole created by temperature. 142 nonillion degrees is sometimes called "absolute hot".