Old Gu had confirmed the darkness of the prophecy was Ozul Ashfall.
That day, his meeting with the Heavenly Emperor had convinced him to take the actions he did today.
Realizing that the threat to him was a child who had yet to harbor such thoughts, the Heavenly Emperor deemed it unbecoming of him to target an innocent who had yet to commit the crime.
With such thoughts in his mind, Old Gu had convinced himself to take matters into his own hands.
He had complete faith in his late friend, the Wise Seer. And according to him, the existence of the Heavenly Emperor was tied to the fate of everything alive.
To protect everything, he had to protect the Heavenly Emperor, the 'Eternal Light' of all the existing Realms and Broken Worlds. To protect him, he needed to put down the prophesized 'Eternal Darkness.'
But killing him was something he also couldn't bring himself to do.
