Composed of a flat, rough, slate-gray crystal, this weapon seems to absorb your thoughts.

When you score a critical hit with a mindfeeder weapon, you gain 1 temporary power point for every 5 points of damage dealt by the critical hit. These temporary power points last for up to 1 minute. You gain power points even if the target has none.
As with temporary hit points, temporary power points do not stack with each other; they overlap. Thus, if the wielder of a mindfeeder weapon successfully scores a critical hit while still enjoying temporary power points from a previous critical hit, the wielder gains only the higher of the two values: either her current number of temporary power points, or the new influx of temporary power points, whichever is greater. Creatures immune to extra damage from critical hits do not trigger mindfeeder weapons.
Projectile weapons bestow this property upon their ammunition.

Prerequisites: Craft Magic Arms and Armor, vampiric touch or psychic vampire (EPH 127).
Cost to Create: 1,000 gp (plus 300 gp for base item), 80 XP, 2 days.