The spiritual armor is the greatest safety guarantee for martial artists. Regardless of how one trains, it's too difficult for the strength of mortal bodies to compete with the power of heaven-sent treasures. Perhaps when one reaches the King Realm, possessing a completely spiritualized body can achieve this, but before the King Realm, the role of spiritual armor for martial artists is truly incalculable.
Even for martial artists like Gong Zheng, who is at the peak of transcending mortality, even with the Escape Technique, facing Old Xu's winning hand would be instantaneous death. However, once he puts on the spiritual armor, he was able to flee from Old Xu's grasp, which says a lot.
Feng Wendong's spiritual armor is also high-tier, only he was too careless and it was broken by phoenix's beak, and when the spiritual armor was shattered, it meant the loss of defensive capabilities.
