Nine Levels of Hell

"Where exactly are we?" Yuan inquired as they stood at the peak of a massive volcano. He thought they were going to feed him treasures to complete his Chaotic Heart.

"We're at the Nine Levels of Hell Peak."

"What a terrifying name. Why did you bring me here? The Primordial Phoenix said you'd help me complete my Chaotic Heart."

"Were you expecting us to feed you treasures or something? You'll be forming your Chaotic Heart here." Feng Yao pointed at the raging flames inside the volcano.

"How does that work?" Yuan asked with raised eyebrows.

"There are nine floors in the Nine Levels of Hell, each floor engulfed in my mother—the Primordial Phoenix's flames," Feng Yao explained. "If you temper your body within these flames, you'll eventually complete your Chaotic Heart. The deeper you go, the more intense the flames become, but the rewards will also be greater."