Yuan Ming nodded to himself as he read, gaining a deeper understanding of top-grade magical artifacts. After composing himself, he continued reading.

The book also mentioned two methods for forcibly upgrading ordinary magical artifacts to top-grade status.

One method was re-refining, which involved adding top-tier spiritual materials to an already crafted artifact, allowing it to withstand the infusion of a fourth rune.

The other method was forceful infusion, which simply meant choosing the fourth rune as a derivative of an existing rune on the artifact. For example, if the artifact had a "Frost" rune, the fourth rune could be its derivative "White Frost" rune, or a lesser "Cold" rune.