When Emperor Xia and the Blood River Daoist attacked Lin Feng, the Emperor of the Dead's eyes have turned completely black, like the darkest abyss in existence.
Rays of grey light shot forth and condensed into three half-black and half-white Dao Fruits. Although these three Life and Death Netherworld Dao Fruits did not contain any strong Evil Souls, they emanated terrifying mana pulses.
These were originally intended for defending against Lin Feng's Thunder Dragon Avatar or Zhu Yi's Higan Golden Bridge, but with his own mana being continuously drained by Lin Feng's Two Elements Origins-Returning Mystic World Spell, the spell he was using to regain his mastery level was about to be destroyed. It was futile to continue resisting on that front.
The three Life and Death Netherworld Dao Fruits all burst into flames, reducing to clouds of black light that shielded the Emperor of the Dead, forming a gigantic black altar.