Thalan's hundred needles

a wall of metal needles is summoned, and is hurled toward a creature at 30ft. The creature must make a Dexterity Saving throw. on a failed save, the needles stick into the creature, dealing 1d4 piercing damage. During the duration, the creature is vulnerable to lightning and fire damage. if the creature was originally resistant to fire or lightning, the creature now takes normal damage. If the creature was originally immune to lightning or fire, it is still immune.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can target one more creature for each slot level above 2nd.