chapter 172 Rules of the ring

In the room, Russo Su sat cross-legged, with the huge Devouring Martial Soul floating quietly behind him. At this time, Russo Su's brows furrowed tightly. Because he had already devoured the 300 second-level seventh-level Beast Soul Soul Crystal that he had exchanged from the sect. But Martial Soul showed no response and showed no signs of being promoted to the Earth level. After a while, Russo Su couldn't help but sigh. The Beast Soul needed to advance to the Earth Level Martial Soul...