Greyhawk 636 CY: The Rise of Asmodeus
Also known as the Archlich, Vecna was a demigod that plagued the Flanaess with his evil for centuries. Born a human, he was a powerful wizard that became a lich and eventually a demigod. His goal was to become the only god in the multiverse. Thirty years ago, he was finally stopped for good at the end of the The Archlich War.