The entrance to the Cave resembled the gaping maw of a gigantic demon beast, as though it meant to swallow everything.
Dense fire spiritual qi drifted back and forth at the Cave's mouth, wreathing the surroundings in heat.
Su Jiu almost thought she had arrived at the Flaming Mountains.
Still, she had to admit that the fire spiritual qi in this Cave was far denser than that in the trial Secret Realm where the Phoenix Egg had been kept.
They were not even on the same level.
The Snow Sprite stared blankly at the Cave before them, its reluctance reaching a fever pitch. "Do we really have to go in?"
Little Green also twisted its body uncomfortably, clearly unaccustomed to the mountain's heat.
Su Jiu did not answer the Snow Sprite's question. Instead, she gave it an answer through her own actions.
She swiftly wrapped her entire body in ice spiritual qi, then vanished into the Cave the next instant.
The moment they entered the Cave filled with fire spiritual qi, Little Pearl could not help drawing in a sharp breath.
"You should be glad you've already reached the Spirit Severing Stage. Otherwise, your ice spiritual qi probably wouldn't last long in this cavern."
Their surroundings were pitch-black. Apart from the sunlight streaming through the entrance, everywhere else lay in darkness.
Upon entering, Su Jiu had already examined this cavern with her divine sense.
The cavern was enclosed by rock, and fire spiritual qi seeped through its uneven walls at various points.
Of course, none of these was its main source. The fire spiritual qi came primarily from an opening leading into another cavern.
A barrier covered this opening, keeping Su Jiu's divine sense outside, yet doing nothing to stop the fire spiritual qi passing back and forth.
Apart from