Bandolier of Ice Knives

You create up to 5 spikes of ice that float around you in a ring. As a bonus action starting on your next turn, you can fling one of the shards at a target within 60 feet of you. Make a ranged spell attack against the target. On a hit, the spike deals 1d10 cold damage. Hit or miss, the shard then explodes. The target and each creature within 5 feet of it must succeed on a Dexterity saving throw or take 2d6 cold damage. The spikes last until you fire all of them or until your concentration ends. 

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, you can create 2 additional spikes for each slot level above 4th.