Only materials of this kind can withstand the power of a Fourth-Rank Array.
Previously, Yu Xian had been stuck here until he received some guidance and advice from Master Natural Law. This led him to the correct path of miniaturizing and fragmenting arrays.
The former is a further refinement, similar to the Array Plate, that preserves the array's power while miniaturizing it.
The latter involves breaking down a complete array into several relatively complete fragments, somewhat like a composite array before, but different and more like a puzzle.
These array fragments are interconnected. Each additional fragment increases the power, and when all the fragments are complete and form a complete array, the full power of the array can be unleashed.
Since a single array fragment is relatively incomplete, its tier is not as high as a complete array. Therefore, even if Daoist Soldiers engrave fragments on their bodies, they do not have to worry about their bodies bursting apart.