Bouncing Bolt of Unlife

A powerful stroke of deathly energy forms a line 100 feet long and 5 feet wide blasts out from you in a direction you choose. It will bounce once from the wall, continuing along until it runs out of range. The bolt cannot affect creatures more than once per casting. The bolt can affect you if you bounce it on yourself. Each creature in the line must make a Dexterity saving throw. A creature takes 8d6 necrotic damage on a failed save, or half as much damage on a successful one. Undead immune to this spell.

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 above 3rd.