Add the following artefacts as subrules to the Artefacts rule:

The WW2 Grenade
‘’‘Location:’‘’ Unknown
‘’‘Description:’‘’ An undetonated German grenade. It seems to be a dud as the pin has been pulled years ago.
‘’‘Protocol:’‘’ To not use the Artefact and bring it to the Containment facility as soon as possible.
‘’‘Effect:’‘’ An Individual carrying this Artefact may focus to activate the effects of all Artefacts in your location, including those carried by Individuals in your location. If an effect requires a choice to be made, choose it randomly out of the legal choices. If the effects apply to the Individual carrying them, they are instead chosen at random from among the Individuals within your location.

A Sketchbook
‘’‘Location:’‘’ Unknown
‘’‘Description:’‘’ A used sketchbook. It seems to contain drawings of mundane items.
‘’‘Protocol:’‘’ None.
‘’‘Effect:’‘’ An Individual carrying this Artefact may focus to copy a subrule of the rule “Artefacts” and set the copied subrule’s location to their own.

Lampshade
‘’‘Location:’‘’ Unknown
‘’‘Description:’‘’ An ornate lampshade. Anything it is set upon appears to become a lamp.
‘’‘Protocol:’‘’ None.
‘’‘Effect:’‘’ An Individual carrying this Artefact may focus to set another Artefact’s Location that they share to the Lampshade or to set any Artefact’s Location that is Lampshade to their Location.

Sandwitch
‘’‘Location:’‘’ Unknown
‘’‘Description:’‘’ A deli sandwitch that appears to be in mint condition. Whenever nobody is looking, it appears to regenerate bites taken out of it.
‘’‘Protocol:’‘’ To keep this Artefact’s location to be either that of a Researcher or the Insititue.
‘’‘Effect:’‘’ An Individual carrying this Artefact may focus to lose 5 Flesh Damage.