Cimeries, the Abyssal Sorcerer

Special Equipment. Cimeries wears a Cloak of Displacement, a Ring of Mind Shielding, and has a Pearl of Power. He also carries three scrolls, a scroll of Cone of Cold, a scroll of Telekinesis, and a scroll of Wall of Force.

Abyssal Manipulator. Cimeries has advantage on Charisma and Wisdom (Insight) checks against demons.

Greater Concentration. Cimeries has advantage on Constitution saving throws to maintain concentration on spells.

Magic Resistance. Cimeries has advantage on saving throws against spells and other magical effects.

Multiattack. Cimeries makes two Demonic Bolt attacks, and uses Abyssal Gaze. Alternatively, Cimeries uses Spellcasting and Abyssal Gaze.

Demonic Bolt. Melee or Ranged Spell Attack: +9 to hit, reach 5 ft. or range 120 ft., one target. Hit: 24 (3d12 + 5) fire or lightning damage (Cimeries´choice). If the target is a creature, it is unable to regain hit points until the start of Cimeries’ next turn.

Abyssal Gaze. Cimeries fixes his gaze on one creature he can see within 60 feet of him. The target must succeed on a DC 17 Wisdom saving throw against this magic or become frightened for 1 minute. The frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target's saving throw is successful or the effect ends for it, the target is immune to Cimeries’ Abyssal Gaze for the next 24 hours.

Call of the Abyss (Recharge 5-6). Cimeries opens a temporary rift to the abyss centered on a point he can see within 120 feet of him. Each creature in a 20-foot-radius sphere centered on that point must make a DC 17 Dexterity saving throw, taking 28 (8d6) fire damage on a failed save, or half as much damage on a successful one. In addition, a barlgura under Cimeries´control appears in unoccupied space in the sphere. The barlgura takes its turn immediately after Cimeries, and can't summon other demons. It remains for 1 minute, until it or Cimeries dies, or until Cimeries dismisses it as an action.

Spellcasting. Cimeries casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 17, +9 to hit with spell attacks):

At will: Charm Person, Detect Magic, Detect Thoughts, Disguise Self, Light, Mage Hand, Magic Missile (cast at 3rd level), Mending (as an action), Minor Illusion, Prestidigitation

2/day each: Banishment, Dispel Magic, Fear, Fly, Invisibility, Polymorph, Suggestion

1/day each: Cloudkill, Confusion, Disintegrate, Dominate Person, Plane Shift

Summon Demons (1/Day). Cimeries summons six dretchs, two babaus, or one vrock. A summoned demon appears in an unoccupied space within 60 feet of Cimeries, is under Cimeries’ control, takes its turn immediately after Cimeries and can't summon other demons. It remains until it is destroyed, or until Cimeries dismisses it as an action.

Heightened Spell (2/Day). When Cimeries casts a spell that forces a creature to make a saving throw to resist its effects, he can choose to give one target of the spell disadvantage on its first saving throw made against the spell.

Quickened Spell (3/Day). Cimeries can use Spellcasting.