Ceric Dragon of the void

Legendary Resistance (6/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Discorporation. When Ceric drops to 0 hit points or dies, his body is destory and he is unable to take physical form for a time

Innate spell casting (3/Day). Ceric may cast fire storm Spell Save DC24. Spell attack modifier +15 flavored as acid coming from ground

Magic Weapons. All attacks by Ceric are considered magical

Regeneration. Ceric regains 2d10+20 hit points at the wstart of his turn

Limited Magic immunity. as a reaction, Ceric may choose to be immune to any spell of level 4 or below. Ceric has advantage on saving throws against all other spell and magical effects.  

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

Bite. Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 21 (6d6 + 10) piercing damage plus 9 (2d8) acid damage

Claw. Melee Weapon Attack: +16 to hit, reach 10 ft., one target. Hit: 17 (3d6 + 10) slashing damage.

Tail. Melee Weapon Attack: +16 to hit, reach 20 ft., one target. Hit: 19 (3d12 + 10) bludgeoning damage.

Frightful Presence. Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 20 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 dragon's Frightful Presence for the next 24 hours.

Acid Breath (Recharge 4–6). Ceric exhales acid in a 102 ft  line that is 20 feet wide. Each creature in that lie must make DC 20 DC Dexterity saving thow taking 88(16d10 acid damage on a failed save or half as much damage on a sucessful one.

The dragon can take 4 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 dragon regains spent legendary actions at the start of its turn.

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

Tail Attack. The dragon makes a tail attack.

Teleportation. Ceric can magically teleport himself, or anyone that he can see, along with any equipment being worn or carried, to an unoccupied space within sight

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 15 feet of the dragon must succeed on a DC 25 Dexterity saving throw or take 17 (2d6 + 10) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

Channel the Void (Costs 2 Actions). Ceric magically unleashes void energy. a pulsating wave of cold energy washes over everything within range. Creatures within 60 ft of Ceric, inducing those behind any type fo barrier and around corners, cannot regain any hit points until the end of Ceric's next urn