Alpine's Frost Blade

You conjure ice to envelop the weapon in your hand, the frost enhancement lasting for the duration. If you let go of the weapon, it disappears, but you can evoke it again as a Bonus Action.

As a Magic action, you can make a melee spell attack with the frost blade. On a hit, the target takes Cold damage equal to 3d6 plus your spellcasting ability modifier.

The freezing blade sheds Dim Light in a 10-foot radius.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 2.