Arrow Barrage

You select an arrow, or melee weapon, and speak a magical incantation. You then fire that missile, or throw that weapon into the air, it disappears. From behind the caster, a hundred magical replications of that weapon pepper the area in a 60ft cone in front of the caster. Creatures in the cone must make a dexterity saving throw, or take 3d10 force damage. On a successful save they take half damage.