By etching an arcane sigil upon a weapon, you infuse it with icy cold, giving it the power to freeze foes.

Daily   ✦     Arcane, Cold
Minor Action      Melee touch

Target: One weapon or implement

Effect: Until the end of the encounter, any attack that uses the target as a weapon or an implement deals extra cold damage equal to your Constitution modifier.
As a free action, the target's wielder can end the effect when he or she hits a creature. That creature is then immobilized (save ends).

Published in Eberron Player's Guide, page(s) 48.