Tiamat

Tiamat the Destroyer is the goddess of destruction, war, and chaos.

During the Calamity it was a Servant of Tiamat that wreaked havoc across Erathia.

Known followers are, amongst others, the Glaurites that follow the teachings of Harold Glaur. Philosophically they are inclined towards nihilism and anti-establishment thinking, i.e. this world is beyond redemption and civilization should be destroyed and rebuilt ground up.

There are shrines to Tiamat in the eastern parts of Erathia but believing in the destruction of society is somewhat of a faux pas.