It was his mother's brother, Quan Gang.
Quan Gang had coveted the throne for a long time. He was the one who had framed Quan Xiao, forcing her to flee. He had assumed that after so many years, she was long dead. To his surprise, not only did she return alive, but she came back pregnant with offspring!
An offspring represented an heir!
Quan Gang wasn't a pure-blooded Soaring Snake to begin with, and with his mediocre talent, he wasn't much of a competitor.
If the children were Demon Beast half-breeds, that would have been one thing. But if they were Soaring Snakes...
Quan Xiao gave birth to a set of twins, both of whom were Soaring Snakes.
One of the Soaring Snake cubs was of mixed Demon Clan blood.
Before their father died, he used his power to seal the Demon Clan power within the child, but there was no guarantee it wouldn't awaken one day.
