In his previous life, Xiao Xuan cultivated the Ancient Desolate Sacred Body. While breaking through to the Great Emperor realm, he was gravely injured by a heavenly tribulation, then attacked from behind by his enemies.
After fighting to the death and wiping out every foe, he dragged his broken sacred body to swallow an undying divine herb, then sent his soul into reincarnation.
When he opened his eyes again, he was the ninth prince of the Great Qian Dynasty.
Reborn with the fruits of a Great Emperor's cultivation, Xiao Xuan abandoned the Ancient Desolate Sacred Body that everyone envied and devoted himself to comprehending the Great Dao, the source of all things.
While others were still struggling to break through the Celestial Grotto realm, he had already reclaimed his place as a Great Emperor.
The Great Qian Dynasty's centennial Mandate of Heaven ceremony was approaching. The princes fought among themselves for the throne, leaving the empire rife with internal strife, while demon clans from beyond the borders and neighboring enemies eyed them hungrily. The realm was on the brink of collapse.
Xiao Xuan had no interest in the struggle for imperial power, but trouble came knocking anyway.
The Supreme Great Emperor raised a finger, and every rebellion vanished in an instant.
He looked down upon all living beings, his voice shaking the universe. "A mere Great Qian is beneath my notice. What I seek is the entire universe!"
I feel like the dragon robe is a bit of a stretch if I don't know. The protagonist doesn't care. The maid doesn't know, but the protagonist is invincible.