After clearing aside the rubble and entering the castle's basement, Lu Yang found that this was indeed the place truly hiding another world within.
Wails, roars, resentment, jealousy...
The souls of the Shi Feng God Race warriors who had died outside the city filled this underground palace with all manner of twisted emotions.
Unlike the material used to construct the castle above, the material here looked even more advanced than Primordial Stone. Moreover, a stone door floated in midair every few meters.
Lu Yang could see clearly with the Gazing World Beast that once he passed through a stone door, it would automatically fall. Even with Lu Yang's current strength, it might take him a month to shatter one of these stone doors, which were even harder than Primordial Stone. The passage ahead stretched for tens of thousands of meters, with multiple rooms folding downward.
The stone doors were not the main problem. The main problem was the torment of these endless resentful souls. The hateful emotions of hundreds of thousands of dead could drive even a Saint-rank powerhouse mad after centuries or millennia of torment. Only a human like Lu Yang could withstand it, but even he could not endure it for too long.
"Who exactly is imprisoned down there? How could there be such immense hatred?" Malthus asked curiously.
"We'll know once we go in." Lu Yang left a Flame Avatar where he stood, while his true body transformed into Annihilation Black Killing Flame and drifted inside.
Bang
The moment he passed through the first stone door, the massive boulder above came crashing down, ruining Lu Yang's plan to sneak inside.
"What a pity. Then I'll have to speed up." Lu Yang shook his head, ignoring the resentful spirits rushing at him and trying to disrupt his emotions