The Demon Ancestor must be the mastermind behind the creation of the Demon Clan.
When Shi Nian was in the Lower Realm, she had clashed with him through spatial projection, but back then, the member of the Demon Clan she encountered was merely an avatar of the True Demon Bottle.
Just an avatar almost annihilated an entire minor world.
The members of the Demon Clan in the Immortal World today are probably born from the main body of the True Demon Bottle.
And the creator of the Demon Clan, throughout this process, must have gained countless benefits.
Hence, describing his current Cultivation as reaching the heavens and piercing the earth wouldn't be an overstatement.
Even if Shi Nian breaks through to Immortal Venerable, she might not be his match, not to mention that she's currently stuck at the peak of Immortal Emperor.
"The Demon Ancestor?" The young leader managed to remain surprisingly calm, "Host, you cannot directly confront this Demon Ancestor, now is not the time."
