User blog comment:ElsaRules!!!/Reverse Artifact Challenge/@comment-4273152-20150727204350/@comment-24588058-20150728152218

Three is a lot of artifacts for one person, though Gandhi has four, if I recall. I think it depends on the person. I believe Gandhi's artifacts all have a calming effect, but the process of that is different for each. (Envelops pure peace, slows heartrate, etc.)

At the same time, some of the Warehouse people have entire sections to themselves (Wells, Escher, Farnsworth). I wonder if, in those cases, most of the items are not artifacts but spare parts or experiments that they worked on that the Warehouse keeps for a safety record.