Uncontainable

The first time The Evilness was contained, they placed its soul inside a jewel, kept under lock and key in the most secure castle in all the lands.

Looters released it within a year.

The second time, they placed the soul inside a non-descript book, in the largest library in all the lands.

A new librarian released it within a month.

The third time, the average cobblestone on a random street in a small town?

Three days, thanks to a magically enhanced horse.

The last time, they tried to destroy it in the largest sun.

Seconds later, everything went dark.