Death Beam

A shadow of crimson etends from the caster in a line 100 feet long and 5 feet wide shoots out from you in a direction you choose. Each creature in the line must make a Dexterity saving throw. A creature takes 8d6  necrotic damageon a failed save, or half as much damage on a successful one.
If killed by the spell they are brought back as a undead under the casters control.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.