Darts Of Death

You create five glowing darts of magical energy. Each dart strikes a creature of your choice that you can see within range. A dart deals 3d6 + 9 Necrotic damage to its target. The darts all strike simultaneously, and you can direct them to hit one creature or several. When a creature takes Necrotic Damage from a dart, it must succeed on a DC 22 Constitution saving Throw or be paralyzed until the of its next turn

Using a Higher-Level Spell Slot. The spell creates one more dart for each spell slot level above 4.