Cell 057 held the Evil Eye.
It was a monster resembling a gorilla, except eyes covered its entire body. Every eye had to be killed to kill it, and as long as someone looked at it, it could come back to life.
Because it was so difficult to kill, it had been imprisoned in the Eternal Silence Prison Tower.
Cell 058 held a demonic sword.
The sword sought out suitable hosts on its own and led them into corruption. It could also draw blood from enemies to strengthen its host and devour souls to strengthen itself. The more it killed, the stronger it became.
After passing through countless hosts, it had grown nearly impossible to destroy. The first warden eventually killed its final host, and the sword was imprisoned in the Eternal Silence Prison Tower.
Cell 059 held a tooth.
The tooth had no name. It would simply appear at random where someone's wisdom tooth should be, triggering a "Wisdom Tooth Crisis" that spread rapidly outward from its host.
Once enough people grew wisdom teeth under its influence, a toothache capable of obliterating souls would erupt.
The tooth had caused countless mass extinctions across All Heavens and Myriad Realms. At last, a passing cultivator discovered it. After countless divine abilities and Daoist arts failed to destroy it, the tooth was transferred to the Eternal Silence Prison Tower and sealed away.
Cell 060 held the leftover bones of a fish.
It seemed to think it was still alive. No one knew how it could move when nothing but bones remained. It had no necromantic energy or influence from a malevolent spirit, yet it really was alive.
In many worlds without supernatural powers, the fish had used the sharp teeth on its bones to bite living creatures to death, leaving countless dead.