Deadline

You expel a round of festering purple energy from your fingertip in a line 15 feet long and 5 feet wide, in a direction you choose. Each creature in the line must make a Constitution saving throw, taking 3d6 necrotic damage on a failed save. If at least one target takes damage from this spell, you regain 1d6 hit points.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 2nd.