As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails. On a hit, the target suffers the attack’s normal effects, and a blast of snow and ice begins to repeatedly batter the target.  If the target ends its next turn within 5ft of you, it immediately takes 1d8 cold damage and the spell ends.  

This spell’s damage increases when you reach higher levels. At 5th level, the melee attack deals an extra 1d8 cold damage to the target, and the damage the target takes for ending its turn within 5ft of you increases to 2d8. Both damage rolls increase by 1d8 at 11th level and 17th level.

Your blade is winter,
pure and sharp as driven snow,
a blizzard of wrath.