Inspired by this wonderful thread on rpg.net of re-imagining Star Wars if the original movie was the only canon - i.e. exactly what you did from 1977 to 1980 - I present this little Artifact from under the Dying Sun.
The Mind-saber appears as a tube of metal covered with electrode touch-points. This Artifact only works in the hands of one possessing psychic powers; it is simply a hunk of metal to anyone else. If a psychic holds the device with a bare hand, he may focus his sorcery into the tube, which creates a shimmering energy-field resembling a sword-blade. Various tubes produce blades of various colours and lengths and no one has any idea why.
The Mind-saber is amazingly responsive to the psychic’s thoughts, allowing even a physically-frail individual the potential to be a combat force. The wielder of the Mind-saber may use his CHA to modify his Combat Roll, rather than his STR. Furthermore, the ‘saber can be moved with such ease that it also provides a Defense equal to the user‘s INT Modifier. The “blade” slices through objects with unnerving ease and is extremely harmful. It has a Damage Multiplier of x3 and the following modifiers vs. Armour Class:
AC 0: +4
AC 1: +3
AC 2: +2
AC 3: +1
Should the wielder lose contact with the Mind-saber, it will shut off. No one has ever been able to figure out why a psychic cannot project his mind-force across space into the weapon, but it only functions when in physical contact with flesh. In addition, because the weapon feeds off of the user’s psychic power, anyone wielding a Mind-saber suffers a penalty of -2 to all sorcery rolls, including using Disciplines and Psychic Combat.