Bab 500: Chapter 142: "Corona

Hesitation was but a momentary flicker before being dismissed from Helios's mind.

Although the intuition of the primordial deities was indeed sharp, it was not surprising to the God of Sun that he would have such a feeling.

He was now, after all, somewhat of a member of the Olympian pantheon, and Gaia's conflict with Zeus was well known.

Strictly speaking, they were still enemies, and perhaps that was the source of the warning... Pushing aside the unease in his heart, Helios stepped into the reddish-brown circle of light.

With a flash, he vanished from the spot.

...

Following a sensation of spatial transition, darkness fell before his eyes, then light returned, and Helios found himself in a massive underground cavern.

The ground was somewhat wet and slippery, uncomfortable to stand upon. Although his exact location remained unknown, the subtle shifts in the environmental laws allowed Helios to ascertain that he was no longer in the Underworld.