Icy Burst is a +2 weapon ability. Icy Burst weapons may be identified by the "Icy Burst" between the item's Enhancement Bonus and the item type, and also visually by the cloud of condensation and small flecks of ice around the weapon's blade or head.
Icy Burst: This weapon is sheathed in icy cold. The weapon deals an additional 1d6 cold damage each hit. In addition, critical hits deal an additional 1d10 cold damage for weapons with a x2 critical multiplier, 2d10 cold damage for weapons with a x3 critical multiplier and 3d10 cold damage for weapons with a x4 critical multiplier.