The author buffed his with endless events and pandora experience levels, but not randomly, and the bonus of primary skills is very precisely controlled, so the hero is not dropping to zero with stats, but increase. I used cheats to calculate the exact damage he does, as without cheats it goes too fast.

The battle screen is showing a spell damage of 5200. But 1876 ghost dragons were killed, that means a real damage of 375200. The hero shows level 0 (reloaded in MP) but his spell power is staying at 99, at least that's what it shows. Real stats can't be checked, at least I don't know a way.