Chilling Smite

The next time you hit a creature with a weapon attack before this spell ends, your weapon is smothered by frost and rime, and the attack deals an extra 2d6 cold damage to the target. Additionally, if the target is a creature, it must succeed on a Constitution saving throw or have its speed reduced to 0 until the end of your next turn.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the extra damage increases by 1d6 for each slot level above 2nd.