From Dark and Darker Wiki
As of this date (02/09/2025), the top of the "Artifacts" page relays that the information below it is up to date, but it isn't in some instances. For example, "Kuma's Fang" no longer adds the 15(1.0) magic damage to it's attacks, and instead just adds 15(1.0) magic damage to the character.
Since the templates you use to render the artifact tooltip are linked to datamined information, could it be that some of those files are outdated? I'm not very experienced in media wiki so this confused me.