The Shield of Argantor

The main relic of Argantor was a shield of light stone, on which stars were inscribed. It was impenetrable, and even the darkest sorcery broke on its surface.
 
After the death of the knight, the shield disappeared without a trace. It cannot be destroyed, which means it is still somewhere in the Sphere. People believe that the demons took him to their capital, but they don't know anything about him.
 
The one who is lucky enough to find it will gain powerful protection: the stars on the shield dazzle enemies, and its firmament becomes stronger than a diamond. But the shield remembers its first owner. He will lead the new bearer, exposing him to the blows of fate, until he finds himself at the entrance to the tomb of Argantor.