Expanding Darkness

3rd level evocation (Sorcerer, Warlock, Wizard)
  Casting Time: 1 action
  Range: 90 feet
  Components: V, S
  Duration: Instantaneous
 
  A massive pillar of darkness forms from a point within range. Each creature in a 15-foot radius, 60-foot tall cylinder centered on that point must succeed on a Constitution saving throw or take 4d8 necrotic damage on a failed save, or half as much on a successful one. If the pillar overlaps an area of magical darkness, this damage increases by 2d8, and creatures which are standing in the magical darkness must also make a saving throw against the spell, even if they aren’t in the area of the pillar.
 
  At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the necrotic damage increases by 1d8 for each spell slot level above 3rd.