Rewrite rule Artifacts to read:

Artifacts are items which a Guardian may hold. The Artifacts are tracked in the gamestate tracking document, in the Artifact List. Each Artifact has a name, which is flavour text, and an Effect, which indicates what happens when the Artifact is activated by a Guardian. The Effect of an Artifact is limited to modifications of Guardians’ Piety, Money, or Livestock. Each Artifact may be held by at most one Guardian. When a Guardian activates an artifact, they stop holding it.

Update the gamestate tracking document to reflect the Artifacts which existed according to rule Artifacts before the above rewrite.