Shang thought a bit about his Weapon Infusion and if he should do more with it.
Weapon Infusion was a combination of a kind of Elemental Mana with Sword Mana. The result would stabilize the Sword Mana and give it the properties of the Elemental Mana.
This also explained why Shang's attack had been so powerful.
Shang had infused his sword with Death Mana using the Concept of Weakness, creating a blade with the properties of the Concept of Weakness.
Naturally, it was possible to also infuse it with other Elements. For example, Shang could also infuse his Sword Mana with the level three Concept of Incineration, which would create an intensely hot blade that could burn through whatever it hit.
However, just because someone could do something didn't mean that doing it was the most optimal thing to do.