Eldritch seekers

You Fling 2 darts of Eldritch energy. They move 60 feet towards the target(s) . On each of your consecutive turns they move an additional 60 feet towards the target. The spell ends if  you lose concentration or the Darts are more than 300 feet away from their target(s). On a hit, the target takes 1d6 Force damage and must subtract 1d4 from its Armor class , which lasts until the end of your next turn. A target's Armor class cannot be decreased by more than 4 when affected by this spell.

Cantrip Upgrade. The spell creates three Darts at level 5, Four at level 11, and five darts at level 17. You can direct the Darts at the same target or at different ones.