Swarming Shades

You summon forth a horde of tortured shades from the Shadowfell and cause them to swirl around in a 20-foot-radius, 60-foot-high cylinder within range. When a creature inside the area regains hit points, they regain only half the normal amount. Additionally, any creature that starts its turn within the area or moves into it must make a Wisdom saving throw. On a failed save, a creature takes 7d8 necrotic damage and is frightened for the spell’s duration. On a successful save, a creature takes half damage and isn’t frightened. A creature can reroll its saving throw against this spell at the end of each of its turns, but only if they are standing outside of the spell’s area.

Undead and constructs are immune to all effects of this spell.