Acid Assault

This crystal seems to contain an incandescent green fluid.

This crystal adds an extra 1d6 points of acid damage to the weapon’s damage, as well as a secondary effect: Target takes –1 penalty to AC for 1 round (multiple hits on the same creature don’t stack).

Cold Assault

Covered in a faint layer of condensation, this clear crystal radiates chilling waves of energy.

This crystal adds an extra 1d6 points of cold damage to the weapon’s damage, as well as a secondary effect: 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

A brilliant blue color, this crystal sparks and snaps with electrical discharge.

This crystal adds an extra 1d6 points of electricity damage to the weapon’s damage, as well as a secondary effect: Target is dazzled for 1 round.

Fire Assault

This fiery red crystal appears to burn with a heatless flame.

This crystal adds an extra 1d6 points of fire damage to the weapon’s damage, as well as a secondary effect: 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).

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.

Prerequisites: Craft Magic Arms and Armor; Melf’s acid arrow, ray of frost, lightning bolt, or fireball; or energy bolt (EPH 100).
Cost to Create: 3,000 gp, 240 XP, 6 days.