Current questions and answers regarding the map editor.

When exporting, the game places files from the external directory into the map archive. Itself.

How do you create your own artifact?

There are three non-functional (intended for campaigns) artifacts in the game: Frída, Princess, and Ring of the Shadowbrand; I don't remember what it was called before. I think Markel was hunting for it. You can safely change the stats of these artifacts, as well as the models, name, description, and icon (data.pak/GameMechanics/RefTebles/Artifacts.xdb and everything that is linked to this file).