Chrono Shards

You create four glowing shards of magical force. Each shard hits a creature of your choice that you can see within range. A shard deals 1d6 + 4 force damage to its target. The shards strike separately across four rounds, and you can direct them to hit only one creature.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the spell creates one more shard for each slot level above 2nd.