Scripts

Haha. Well, for that purpose, I would create a copy of the artifact with the same model, based on some kind of Frida... If it has to be done with scripts, you can implement a check to see if the hero has the artifact, and if so, remove the stats that the artifact gives. But this method isn't very good; some bonuses can't be removed (+ to initiative, for example), and it seems like there isn't a function in the game to check if an artifact is equipped or not (only a check for the number of equipped artifacts from one set, although I might be wrong).