Sypha's Ice Shards

You create five shards of ice, floating in front of you in a circle. When you cast this spell, and as an action on any turn throughout its duration, you may throw any number of them at your enemies. Make a ranged spell attack for each shard you use, dealing 1d4 piercing and 1d4 cold damage on a hit. 

Additionally, you may use these shards for defense. When you are the target of a non-area attack, you may use your reaction to enter a defensive stance until the beginning of your next turn. Until your next turn, you may expend ice shards to add +1 to your AC against a single non-area attack for each shard expended, including the attack that triggered this reaction. You can use this defense against any number of attacks, as long as you have ice shards left to expend.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the number of shards summoned increases by one.