Belmod became a God of Destruction around 267,974 years before Age 780.
In the manga, at some point in time Belmod participated in the All Universe Hide and Seek Tournament held by Zeno. But when Beerus hid and fell asleep for fifty years during the tournament, it had to be cancelled. He and the gods had to calm Zeno down who was furious. Since then Belmod and the other Gods of Destruction have felt disdain towards Beerus.