"Underworld Reincarnation Pill? I never imagined you could use the Heaven and Earth Primordial Core to such a flexible extent. It seems I indeed underestimated you!" The Primordial Heavenly Demon King, after receiving Du Fei's strike, paused somewhat awkwardly in mid-air. His expression changed, and he spoke with a hint of surprise.

"True to your reputation, Primordial Heavenly Demon King, you have a keen eye!"

A hint of faint astonishment flashed in Du Fei's ...