Chilling Blow

As part of the action used to cast this spell, you must make a melee attack with a weapon against a target within range, otherwise the spell fails. On a hit, the target suffers the attack's normal effects and takes an additional 1d6 cold damage as it is enveloped in a crust of frost until the start of your next turn. If the target makes an attack roll before then, it immediately takes an additional cold damage equal to 1d6 + your spellcasting ability modifier, and the spell ends.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the initial extra damage dealt by the attack increases by 1d6 for each slot level above 1st.