Introductory campaign – “The Emperor’s Will” [1 campaign – 2 mission].

It’s most likely a bug. After the first two missions, I gained access to all artifacts except the last one. Maybe updating the game will help.

No, I found all the artifacts. One is with the hero; after acquiring it, a quest appears. Another is south of the Necropolis, and the last one is east of Valesk.

A similar situation with the artifact. Here, south of the Necropolis, it’s not there. It would be helpful to see a screenshot.