The Nightmare of Azeel

You call out to the Fallenstar Azeel and conjure a terrible cloud of mind-numbing death. Each creature in a 120-foot-radius sphere centered on a point of your choice within range must make a Wisdom saving throw. You may exclude a number of creatures from the effects of this spell equal to your Spellcasting Modifier. Creatures targeted by this spell cannot use a feature to automatically succeed or reroll the saving throw and creatures immune to being magically put to sleep must still make the saving throw. On a failed save, a creature becomes unconscious for the duration. Unconscious creatures are sucked into a terrible nightmare realm and their souls are separated from their mortal bodies. At the start of an affected creature's turn they take 6d10 necrotic damage as their bodies rot from the inside out. The only way to escape the affect of this spell is to return the soul to the body, which cannot be done with simple restoration spells. A soul must physically return to the plane their body is located and then enter it. On a successful save, a creature takes 10d10 psychic damage, as they behold for a fraction of a second the heart of Azeel, and is stunned until the start of your next turn.