For him, the greatest utility of Immortal Crystals was feeding them to the Mirror of Zhou Tian. He had not yet reached the stage where ordinary Immortals required Immortal Crystals to extend their lifespan.
Three thousand Immortal Crystals vanished into the Mirror of Zhou Tian. This time, the mirror seemed to feed quite contentedly; its pages even erupted with a brilliant golden radiance, which Fang Chen promptly suppressed with a containment spell.
"Younger brother, turn to page 783. There is something you need on it." The voice of the Mirror of Zhou Tian was remarkably deep and resonant.
Chapter 618