Futurist's Guide to Gadgets!
In most ways, Artifacts are exactly like Gadgets. But Artifacts can have two unusual qualities that Gadgets can’t: Geas and Sentience.
An Artifact with a Geas will only work for certain people or if certain conditions are met. The effects of this are highly variable and should be defined by the player and GM when the artifact is created. It can be an advantage or a drawback For example, Thor’s hammer has a Geas that only the honorable can lift it. To anyone else, it simply cannot be picked up. What defines an honorable character is largely up to the GM, though the Norse idea of honor should be used as a starting point. A Geas can be a Miscellaneous Advantage, as with Thor’s hammer, or a Miscellaneous Drawback, as with Warlord’s sword. Either way, it is usually worth 50 HPs.
Sentience is a 25 HP drawback if the overcome roll only needs to be made once as long as the character possesses the artifact. It is a 50 HP drawback if it must be overcome once per day (15 APs).