As he got closer, the temperature turned warmer. It was blistering hot when he was less than thirty meters away from the miniature sun.
The spirit overseer below was right, if he didn't turn this miniature sun into this dim version, he won't be able to get close to it.
He continued. It was harder to proceed as there were fewer handholds, so it took him a long time. He was full of sweat due to the heat. As he was around ten meters away from the prize, there was no handhold at all. There was even an upside-down crater in the ceiling directly above the miniature sun. The surface of this crater was extremely smooth, even his climbing claws had difficulty getting a grip.
The surface here must have been affected by the heat of the miniature son. After long exposure to the heat, it slowly melt and turned into this reversed crater with smooth surfaces.