Pick of Iceparting

This +2 cold bane heavy pick can score critical hits against creatures of the cold subtype normally immune to critical hits.

Once per day, a pick of iceparting can be swung at an icy surface (such as a glacial wall, the surface of a frozen lake, or an iceberg) as a standard action. Three tiny fractures radiate out from the point you struck toward any three points within 50 feet; these three points can be chosen by you but must be connected to the initial impact point by a solid sheet of ice. When the cracks reach their targets, they cause the ice located there to explode violently. Any creature within 5 feet of this explosion takes 3d6 points of piercing damage (Reflex DC 14 half).

Prerequisites: Craft Magic Arms and Armor, crack ice, summon monster I

Cost to Create: 14,600 gp, 1,168 XP, 30 days.

Source: Frostburn, page 111.