The castle depository was filled with various regular artifacts as well as Hex artifacts.
These artifacts had been used in the demon magic circle to act as conduits for the surplus of demonic energy as well as to balance out any lack of demonic energy during certain times.
Since Yona and Shaai had destroyed the castle's formations, the artifacts were no longer tied to the demon magic circles. This meant they could be freely taken out.
Among the assortment of artifacts, there were ancient talismans inscribed with runes of protection, and intricate amulets adorned with gemstones that seemed to shimmer with inner light, indicating the fact that they could unlock new Skills for those who broke it as a one-time use.
There were some weapon-based artifacts carved with ancient symbols, highlighting their demonic heritage. Then some defensive-type artifacts were either one-time or multi-time use.