Zenemeth

In the beginning, when the world was young and the gods were creating the earth, they made a mistake. They created a being of immense power and malevolence, a being who sought only destruction and chaos. This being was Zenemeth, the malevolent god.
Zenemeth reveled in destruction and chaos, delighting in the suffering of mortals and immortals alike. He caused natural disasters, wars, and plagues, and his followers worshiped him with bloody sacrifices and dark rituals. The other gods, horrified by Zenemeth's actions, fought against him, but he was too powerful for them to defeat.
In a desperate attempt to contain Zenemeth's power, the gods imprisoned him deep beneath the earth, sealed away in a prison of divine magic. But even in his prison, Zenemeth's power could be felt, and his followers continued to worship him in secret, waiting for the day when their god would be free once more.