Blight Beam

A bright, 15 feet wide, neon colored beam shoots out just infront of your hand. All creatures within the beam's area must make a DC 16 Constitution saving throw. A creature takes 24 (8d6) Necrotic damage on a failed save, and only half as much on a successful one. The beam does technically have unlimited range, but it's focus and effectiveness wares of by -3 points of Necrotic damage after every 30 feet increment.

At Higher Levels. When upcasting this spell using a spellslot of 4th level or higher, add 1d8 Necrotic damage for each slot level above 3rd.