Price (Item Level): 600 gp (3rd) (least); 3,000 gp (7th) (lesser); 6,000 gp (10th) (greater)
Body Slot: — (weapon crystal)
Aura: Faint; (DC 17) evocation/psychokinesis
Activation: —
Weight: —
This crystal seems to contain an incandescent green fluid.
Covered in a faint layer of condensation, this clear crystal radiates chilling waves of energy.
A brilliant blue color, this crystal sparks and snaps with electrical discharge.
This fiery red crystal appears to burn with a heatless flame.
A crystal of energy assault adds a particular type of energy damage to a weapon’s attacks: acid, cold, electricity, or fire. This bonus damage doesn’t stack with any energy damage of the same type dealt by the weapon.
Least: This crystal adds 1 point of energy damage of its type to the weapon’s damage.
Lesser: This crystal adds an extra 1d6 points of energy damage of its type to the weapon’s damage.
Greater: This crystal adds an extra 1d6 points of energy damage of its type to the weapon’s damage, as well as a secondary effect depending on the type of crystal:
Acid Assault: Target takes −1 penalty to AC for 1 round (multiple hits on the same creature don’t stack).
Cold Assault: Target’s speed is reduced by 10 feet for 1 round, to a minimum speed of 5 feet (multiple hits on the same creature don’t stack).
Electricity Assault: Target is dazzled for 1 round.
Fire Assault: Target takes an additional 1d6 points of fire damage 1 round later (multiple hits on the same creature don’t increase the next round’s damage beyond 1d6).
Prerequisites (M): Craft Magic Arms and Armor, acid arrow, fireball, lightning bolt, or ray of frost.
Prerequisites (P): Craft Psionic Arms and Armor, energy bolt.
Cost to Create: 300 gp, 24 XP, 1 day (least); 1,500 gp, 120 XP, 3 days (lesser); 3,000 gp, 240 XP, 6 days (greater).
Source: Magic Item Compendium, page 64. Updated to properly list psionic feats as well as powers.