After making contact with the eye on Vernon's palm, he could entrap one in an illusion of his design.
The illusion ability was referred to as Tsukuyomi. With this ability, Vernon was capable of uttering the victim's perception of time.
He could subject the victim to days, months, or even years of antagonizing torture in a matter of seconds.
When the five death merchants had come in contact with those eyes, Vernon instantly used the power on them, entrapping them into a nightmare realm.
And the torture that seems to have been going on for over an hour was merely performed in the blink of an eye on the outside world.
Orpheus clenched his hand into a tight fist, and with a furious look on his face, he took a step forward, closing the gap between himself and Vernon.
However, if there was one thing Orpheus did, then it was not to look into Vernon's eyes. Even though he was very angry about what occurred, he was able to keep his sanity and not look into Vernon's eyes.