As for which Virtue it was, he had used it for so long that there was no need to go into detail...
Colin nodded, not surprised by this.
The materials that could become part of the Golden Artifact were mostly at the level of a First Level Containment Subject.
And that ancient legend of the "King of Knights" was a terrifying force unto himself, combining the eight "Virtues," his strength even surpassing many First Level Containment Subjects—that part of the story was told to Colin by the King of Savage Sound.
In other words, he or she was on par with a god.
Moreover, because he was able to understand the notes on the artifact, he had a clearer understanding of many details than Shana did, knowing that the artifact was supposedly handcrafted by the enigmatic "Mister Huang He"...