Ice Knife

You create a shard of ice and fling it at one creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1D10 Piercing damage. Hit or miss, the shard then explodes. The target and each creature within 5 feet of it must succeed on a DEX saving throw or take 2D6 Cold damage.

Using a Higher-Level Spell Slot: The Cold damage increases by 1D6 for each spell slot level above 1.