A hundred years was enough to bring about countless changes in a mortal city, but to Heavenly Demon City, it was no more than the snap of a finger. Not even an extra scratch had appeared on its walls.
Everything seemed no different from before Yi Yun entered seclusion.
But Yi Yun had cultivated to this level, and his strength was now immense. His comprehension of the laws was on par with the Heavenly Dao, allowing him to clearly sense every minute change in the city.
Yi Yun sensed that the Dao patterns and laws engraved throughout the city were different from a hundred years ago.
The Heaven and Earth Grand Array of Heavenly Demon City had been altered!
Heavenly Demon City had stood for several billion years, and the Heaven and Earth Grand Array had existed for just as long. For such an ancient, powerful formation, even the slightest alteration was a momentous matter.
"If I'm not mistaken, the Demon Ancestor has already come to Heavenly Demon City. He left something behind in the city's grand array..."
Yi Yun spoke to Bai Yueyin in his soul sea.
The original controllers of Heavenly Demon City's grand array were the two Demon Race ancestors. Controlling the grand array was itself a symbol of their status as the city's supreme rulers.
For the Demon Ancestor to intervene in Heavenly Demon City, the most direct method was to leave his own mark in the city's grand array. That way, the formation would have to obey his commands.
"Has the Demon Ancestor's strength already reached such a level? To make the two Demon Ancestors swallow their anger and endure it like this..." Bai Yueyin's heart grew heavy.
Yi Yun said, "Heavenly Demon City is indeed important to the Heavenly Demon Ancient Clan, but if...