Bone Shard

You extract a shard of bone and launch it at a creature you can see within range. On a hit, the target takes 1d6 piercing damage as the shard enters its body. The target must then succeed on a Constitution saving throw or take 1d4 necrotic damage at the start of its next turn, as the disease propagates.

The spell creates more than one shard when you reach higher levels: two shards at 5th level, three shards at 11th level, and four shards at 17th level. You can direct the shards at the same target or at different ones. Make a separate attack roll for each shard.