>Read this shit
>MC spends 100,000 years training in a dungeon alone
>Obviously becomes blood thirsty and crazy after 1500 years, he grows more warped from that point onward
>Even after a few hundred years he grew 1000000000x stronger than every legendary hero in the world
>He gets to the point where he has to nerf his power heavily to get even a slight thrill out of fighting boss monsters
>Grows to the point where his mere presence can destroy top rank monsters
>Leaves the dungeon
>Suddenly reverts a bit in an odd way
>Has to "unseal his power" to deal with common bandits, when even being near them should be instant death
>Somehow there's a huge regression the instant he goes back to human world
>He's still killing things, but it feels a lot weaker, like he shouldn't have to go to this much trouble to deal with it
Odd