Deepening Gloom (HB)

You enhance the density of the shadows in a 30-foot Emanation centered on you so that light cannot penetrate them. When you cast this spell in an area with Dim Light or Darkness, you turn it into magical Darkness. Each nonmagical source of illumination in the area is extinguished. If any of this spell's area overlaps with an area of light created by a spell of 5th level or lower, the spell that created the light is dispelled. In addition, while in the affected area, you gain Blindsight up to the confines of the magical Darkness. Each time a creature ends its turn within the area affected by this spell, it must make a Wisdom saving throw. On a success, the creature becomes immune to this spell's effects for 24 hours. On a failed save, it becomes Frightened. While a creature is Frightened in this way, it also has Disadvantage on its saving throws and it is no longer considered a willing target for other creatures' spells and effects. If a Frightened creature ends its turn outside the area of this spell, it can repeat its saving throw to end the effect on itself. Creatures that can see through magical Darkness ignore this spell's effects.