Adult Red Dracolich

Legendary Resistance (3/Day). If the dracolich fails a saving throw, it can choose to succeed instead.

Innate Spellcaster. Dragons are innately magical creatures that can master a few spells as they age. It is an 18th level spellcaster, its spellcasting ability is Charisma (spell save DC 21, +13 to hit with spell attacks). The dracolich has the following spells prepared:

Cantrips (at will): Fire bolt

1st level (2 slots): shield, magic missile

2nd level (2 slots): invisibility, mirror image

3rd level (2 slots): fireball, counterspell

6th level (2 slots): disintegrate, globe of invulnerability

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

Turn Resistance. The lich has advantage on saving throws against any effect that turns undead.

Multiattack. The dracolich can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +15 to hit, reach 10 ft., one target. Hit: 20 (2d10 + 9) piercing damage plus 5 (1d10) lightning damage.

Claw. Melee Weapon Attack: +15 to hit, reach 5 ft., one target. Hit: 16 (2d6 + 9) slashing damage.

Tail. Melee Weapon Attack: +15 to hit, reach 15 ft., one target. Hit: 18 (2d8 + 9) bludgeoning damage.

Frightful Presence. Each creature of the dracolich’s choice that is within 120 feet of the dracolich and aware of it must succeed on a DC 19 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to the dracolich’s Frightful Presence for the next 24 hours.

Fire Breath (Recharge 5–6). The dracolich exhales fire in a 90-foot cone. Each creature in that area must make a DC 23 Dexterity saving throw, taking 73 (21d6) fire damage on a failed save, or half as much damage on a successful one.

Magical Absorption. On any successful save against a magical effect, the dracolich rolls a d6 and regains a spell slot of that level or lower. If it has no spent spell slots of that level or lower, nothing happens.

The dracolich can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The dracolich regains spent legendary actions at the start of its turn.

Detect. The dracolich makes a Wisdom (Perception) check.

Tail Attack. The dracolich makes a tail attack.

Immolate.  The dracolich lights ablaze. Each creature within 10 feet of the dracolich must make a DC 21 Dexterity saving throw and move out of range of the effect or take 23 (4d6+9) fire damage. Any creature that chooses to remain within range of the aura takes half damage on a successful save.

Wing Attack (Costs 2 Actions). The dracolich beats its tattered wings. Each creature within 10 feet of the dracolich must succeed on a DC 21 Dexterity saving throw or take 14 (2d6 + 7) bludgeoning damage and be knocked prone. After beating its wings this way, the dracolich can fly up to half its flying speed.