During the final years of the empire it had become common practice

The first were the slave empires ruled by possessors of PK.

The second were hunter-gatherer tribes without PK who wished to escape the threat of the empires.

The approximately nineteen slave empires persevered for over six hundred years

Consequently, his rule saw a decline of his empire's population by half. Corpses lay rotting on the fields and in the hills.

Next, we have the fabled sacred jar of the Rai Dynasty, Inspirational Blue.

The cult's greatest accomplishment was the assassination of the Septim Dynasty and the opening of the Oblivion Gates.

Dagon's Mythic Dawn cult killed the Septim Dynasty and opened the Oblivion Gates into Tamriel. They called it the Oblivion Crisis.