There were nine ranks to immortal light—red, orange, yellow, green, azure, blue, purple, black, and white. When immortals first obtained immortal light, they gained first rank red light. Immortal light didn’t progress with an immortal’s cultivation. It required continual infusion of rare and powerful treasures to raise its level.

The costs were high to enhance its level. Lu Youya had expended more treasures than he could count to raise his immortal light to orange.

The detonation of orange rank immortal light rivaled the self-detonation of the immortal soul. It would shake the ninth rank formation and unleash recoil on those overseeing it.

However, no recovery was possible after immortal light was destroyed. It was the core essence of an immortal and its absence meant that an immortal would never again advance in their cultivation. Those without their immortal light would also see their strength decrease by thirty percent, if...