C419 The True Spirit of Martial Arts(2)

If it was somewhere else, Gu Ning could definitely push back the opportunity for him to break through. But now, the difficulty Undying Nether King set up was to refine the Martial Dao True Spirit. If he could not condense the Martial Dao True Spirit, how could he break through?

"I've never seen a Saint Spirit Stage warrior use a Martial Dao True Spirit before." Gu Ning couldn't help but ask