This is a magic sword for my Pendragon of Mars campaign.
THE RELIC SWORD
"Star-Eater" is an ancient electro-sword from before the Apocalypse. It can function as a normal sword, but this is not the true power.
STAR-EATER can be sheathed in a powerful electric field similar in design to a particle shield, which allows it to slice through any object. Unlike a regular particle shield, STAR-EATER grows more powerful when it contacts extreme heat, energy, or kinetic force.
In addition, STAR-EATER contains a highly advanced onboard AI. To activate this AI, several wires which hang from the pommel must be inserted into the wielder's nerve-endings. Once this is done, the mind of the sword and the mind of the wielder become one. The Sword is laden with complex spatial cognition algorithms. When properly connected, the user can make Personal Combat checks at +10 and can also use the Sword to absorb incoming plasma blasts or laser beams. As the sword absorbs more energy, it gains greater combat bonuses.
The Sword uses up a Type A energy cell every other round when the field is activated, except rounds in which it absorbs energy. If the Sword is plugged into the wielder, it requires no energy cells (it instead draws from the life-force of the wielder).
Some say that the Sword is cursed, and will cause only destruction and ruin to all around it. Every time STAR-EATER is plugged into the wielder's nervous system, he must take a check for trait: VENGEFUL