'Eximus.'
According to the brown-haired man's story, that person named Eximus was the most terrifying existence from ten million years ago.
He was a follower of Chaos, someone who inherited the power of an Ancient Spiritual God and used it to wreak havoc on the world. During that time, the three temples almost went up in flames due to his actions.
'To think there's a Spiritual God on this island.'
Spiritual Gods were similar to spirits in that they were physical manifestations of nature. Only, Spiritual Gods could only be created through blind faith. They were incredibly rare entities. No more than three had been created in the entirety of the True Void Universe's history.
Even Damien only knew about them because he read the Heavenly World's existence.
In this plane, Chaos was something both worshiped and feared. It was trapped at the center of the earth with no hope of escaping, which was good for Damien.