Kent learned from Elaine's father that they were once a family of powerful Life magicians. Long before the battle of parting, the Wynthrall rose to the peak of this world, producing many immortals.
Back then, one could rise to the ranks of Heavenly Ascension, and after calling down the heavenly tribulation, they could ascend to the Immortal worlds.
There were no High worlds or Medium worlds back then.
However, once one reached the limit, which was at the Heavenly Ascension stage (the peak in a high world now), they would ascend using tribulations or an ascension stone.
The Wynthrall family produced many geniuses who were sent away to enrich the family name in the immortal worlds.
They were bigger and more powerful, even bigger than the most powerful sects. However, that all came down within the blink of an eye.