Of course, other members of the Demon Clan were not a concern, as they had already been in decline for years and did not warrant any attention. What concerned Master Heavenly Fate and Master Heavenly Luck was the revival of the Ancestor of Demons.
However, how exactly did the Ancestor of Demons resurrect? Logically, it should have been impossible for him to have survived until now without anyone from the human race being aware of it.
At this point, Master Heavenly Fate and Master Heavenly Luck were completely baffled. Even with their cultivation level, it was impossible for their lifespan to exceed billions of years.
Thus, the Ancestor of the Demons should not have had such an incredibly long lifespan either. However, he had indeed survived until now under their grasp of fate.