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Greater Chilled Blade
Bard Attack 17

You touch a weapon and lay your enchantment upon it, sheathing the weapon in a thin layer of jagged ice.

Melee 1

Target: One weapon

Effect: The next weapon attack made with the target weapon before the end of your next turn slows the attack's first target until the end of its turn. On a hit, that target also takes 2d10 extra cold damage.

Greater Chilled Blade is an encounter power available to bards at the 17th level.[HotF:65]