The effectiveness of the Iron Wall Divine Skill, in cooperation with the Yama Palace, overlaps somewhat with the Void Refining Divine Skill.
Void Refining was actually a divine skill plucked by Qin Zhizhen in the fourth Inner Mansion, originally before achieving Void Refining, Qin Zhizhen, when facing formidable enemies, would typically use the Iron Wall Divine Skill as a barrier to buy time for the evolution of Yama Palace.
After plucking the Void Refining Divine Skill, Qin Zhizhen developed it to a certain extent, allowing Yama Palace to manifest in the void, instantly securing an invincible position. In terms of protecting Yama Palace, it actually surpasses the Iron Wall.
Thus, the Iron Wall Divine Skill gradually became a technique Qin Zhizhen rarely showed to others.
But that does not mean the Iron Wall is weak.
In fact, as a divine skill plucked by Qin Zhizhen in the first Inner Mansion, his development of this divine skill is especially profound.
