Ok. The 'Artifact' Advantage in the core book reads...
"The character possesses a mystical device of enormous power.
Effects: The Player and the Game Master must agree on the abilities of the device. Spending additional points increases the capabilities of the object."
Nowhere in the book does it give any examples, and Vladimir Nux' sword in the GM's Toolkit is supposedly a Level 1 Artifact.
What does everyone here use for guidelines for artifact powers? Any help I can get on this is much appreciated.