Erik's Quills

You conjure and throw 2d4 long quills, which strike one or two chosen targets within range upon an equal amount of successful ranged spell attacks. These quills are even able to get in between the chinks in the target’s armour. Each does 1 point of piercing damage each, for each of three rounds, and remains in the wound. 

The target may use a bonus action to yank a quill out, but that inflicts an additional 1 point of damage. Otherwise, the quills vanish in 10 minutes.

At Higher Levels. The number of quills you create increases by 2d4 when you reach 5th level (4d4), 11th level (6d4) and 17th level (8d4). Additionally, the number of targets you can choose to throw the quills at increases accordingly.