System Bestows me with Immortality, Living on to Eventually Become Invincible

On the desolate island, the bleak sea breeze blew, and darkness and solitude were the eternal melodies here.

Black Bull and Little Chi were tinkering with a medium-sized teleportation array at the center of the island, communicating effortlessly in beast language with constant mooing and growling.

Chen Xun sat cross-legged by the shore. Although there were no living beings on the island or in the sky, the Forbidden Sea still harbored various sea beasts and fish, with the creatures at the far end being the most peculiar.

Boom!

The sea surface exploded, and the black sea surged towards Chen Xun. A faint light shimmered around him, forming a five-colored shield that sizzled as the black sea crashed against it.

In his hand appeared a large fish at the Foundation Establishment stage. Its species was indiscernible, but its mouth bore fangs, and its blood-red eyes stared fixedly at Chen Xun.

The fish opened its bloody maw, showing no fear even in the face of an Elemental Infant cultivator. It had lost its intelligence, driven only by savage instinct.

Chen Xun pointed a finger, and the fish's pupils dilated. Its body gradually shriveled as a stream of filthy blood was extracted, hovering in front of Chen Xun.

"This..." Chen Xun frowned. "How is it stranger than the blood of demonic cultivators? It doesn't seem like the blood of a living being."

He examined it closely. This blood lacked even essence qi, as if it were not recognized by the heavens and earth. Essence qi is naturally occurring, inherent in every living being.