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

Shattered Mind. Aeloth can concentrate on up to 3 spells simultaneously. Roll separate concentration checks for each. He cannot concentrate on the same spell twice.

Spellcasting. Aeloth is an 20th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 19, +11 to hit with spell attacks). Aeloth can cast disguise self and invisibility at will and has the following wizard spells prepared:

Cantrips (at will): Fire Bolt, light, mage hand, acid splash, shocking grasp, chill touch

1st level (5 slots): ray of sickness, shield, mage armor*, magic missile

2nd level (5 slots): scorching ray, mirror image, misty step

3rd level (5 slots): counterspell, dispel magic, thunder step

4th level (4 slots): polymorph, resilient sphere, sickening radiance*

5th level (4 slots): Hold Monster, immolation, wall of force, Synaptic Static

6th level (3 slot): globe of invulnerability, scatter, Disintegrate

7th level (2 slot): Forcecage, Power Word Pain, Project Image

8th level (2 slot): Maddening Darkness

9th level (1 slot): Invulnerability

*Aeloth casts these spells on himself before combat.

Spellbook. Aeloth has access to the following additional spells:

• Level 9: Meteor Swarm, Gate
• Level 8: Demiplane, Control Weather, Clone
• Level 7: Teleport, Project Image
• Level 6: Contingency (permanently keeps up Mirror Image in case of being attacked)
• Level 5: Teleportation Circle
• Level 4: Locate Creature
• Level 3: Sending

Legendary Resistances (5/day). If Aeloth would fail a saving throw, he can choose to succeed instead.

Turning Immunity. Aeloth's will is so strong he cannot be turned.

Cannot be destroyed. If Aeloth takes damage that would reduce him below 0 hit points, he begins losing death saving throws as if he was a player character, but can fail any number of saving throws. He removes one lost death saving throw at the beginning of each turn. When he has no failed death saving throws and 0 hit points, he returns to 1 hit point instead at the start of his turn.

Red Shield. Aeloth gains 100 temporary hit points at the beginning of his turn.

Special equipment. Aeloth carries a Staff of Power with 20 charges.

Staff of Power. Melee or Ranged Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) bludgeoning damage plus 3 (1d6) force damage.

Master of Spells. Aeloth casts one spell of 9th level or lower, then casts one spell of 4th level or lower, then casts a cantrip, then may make a Staff of Power attack. He may not cast the same spell twice in one turn. He may substitute either of his spells to use the Staff of Power instead. Aeloth suffers no disadvantage due to enemy proximities when making ranged spell attacks.

Aeloth has 6 legendary actions, and may use one at the end of a character's turn. He regains all uses of each action at the beginning of his turn.

Cantrip (costs 2 actions). Aeloth casts a cantrip.

Misty Step. Aeloth expends a spell slot to cast Misty Step

Dispel Magic (costs 3 actions). Aeloth casts Dispel Magic using a spell slot of 3rd level or higher.

If Aeloth is reduced to 0 hit points, a Nightmare of Kalossia appears in an unoccupied space within 40 feet.