Lin Yuan had chosen the chain blade for the Source Sand's Metal Consume Manifestation first form because it was good for attack, defense, and control.
However, he chose to enhance his self-protection capabilities for the second form change.
There were only two ways to enhance one's self-protection capabilities. One was to enhance the ability to resist blows, while the other was to enhance one's speed and dodging abilities.
Regardless of which one it was, they were an excellent choice for enhancing protection.
Lin Yuan was a person with a mature mind, so he wanted to do all of them.
Previously, the Source Sand was only a Bronze X/Fantasy I source-type item. Thus, Lin Yuan had chosen the strong and sharp ferromanganese with metal characteristics that could be used with the chain blade to deal damage to a target.