Adult Aad'Raagón

Legendary Resistance (3/Day, or 4/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.

Multiattack. The dragon makes three Rend attacks. It can replace one attack with a use of Spellcasting to cast Tasha's Mind Whip (level 3 version).

Rend. Melee Attack Roll: +11 to hit, reach 20 ft. Hit: 13 (3d8) Slashing damage plus 5 (2d4) Psychic damage.

Advertising Breath (Recharge 6) Wisdom Saving Throw: DC 18, each creature in a 60-foot Cone. Failure: 65 (10d12) Psychic damage, and if it fails a D20 Test until the dragon uses a breath weapon or dies, it takes 13 (2d12) Psychic damage. Success: Only half damage.

Frustrating Breath. Wisdom Saving Throw: DC 18, each creature in a 60-foot Cone. First Failure: The target has the Incapacitated condition until the end of its next turn, when it repeats the save. Second Failure: The target has the Prone condition, and it repeats the save at the end of each of its turns, ending the both conditions on itself on a success. Each time it fails one of these Wisdom saves, it takes 18 (4d8) Psychic damage. After 1 minute, it succeeds automatically.

Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 18, +9 spell attack bonus.)

At Will: Detect Magic, Enemies Abound, Tasha's Mind Whip (level 3 version)

1/Day Each: Sending, Raulothim's Psychic Lance

Advertisement Boon. 3/Day.  The dragon screams an advertisement. Up to three creatures that it chooses within 90 ft of the dragon gain one benefit from the list below. The benefit can be different for multiple targets. A creature cannot be blessed twice with this ability.

• Its Speed doubles for 1 hour. (Limited Time Only)
• It can take an action now, using its Reaction. (Take Action Now) 
• It gains Blindsight and Tremorsense 30ft for 1 hour. (Don't miss it)
• Chooses a skill. It has Advantage on those checks for 1 hour. (Take advantage of our new offer!)

Advertisement Bane. 3/Day. Up to three creatures that it chooses within 90 ft of the dragon gain are cursed with one effect from the list below. The curse can be different for multiple targets. The curse can be removed with a Remove Curse spell. A creature cannot be cursed twice with this ability.

• Its Speed is halved for 1 hour. (Buy our new superglue)
• On its next two turns, it can only do one of the following: move or take a Bonus Action or an Action. (No need for haste! It'll be delivered straight to your door!)
• For the next hour, it cannot take Reactions. [not reacting that something was delivered to its door]

Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 18, +9 spell attack bonus.)

At Will: Detect Magic, Enemies Abound, Tasha's Mind Whip (level 3 version)

Legendary Action Uses: 3 (4 in Lair). Immediately after another creature's turn , the dragon can expend a use to take one of the following actions. The dragon regains all expended uses at the start of each its turns.

Cloud of Advertisements. Wisdom Saving Throw: DC 18, one creature the Aad'raagón can see within 120 feet. Failure: 13 (3d8) Psychic damage, its next attack roll or saving throw made before the end of its next turn has Disadvantage, and the Cloud of Advertisements descends on the creature. The Cloud of Advertisements is seen as a spectral cloud hovering the creature's head, and from the cloud there seem to be pieces of paper floating out, with words written on them that vanish when it hits the creature's body. The Cloud cannot be seen by the affected creature. At the end of each of its turns, it makes the same save, taking the damage again and clearing its mind of advertisements on a success. Only one creature can be affected by this effect at a time.

Mass Advertisement (Costs 2) The dragon unleashes a wave of annoyance. Wisdom Saving Throw: DC 18, creatures of its choice in a 30ft Emanation originating from the dragon. Failure: The creature is Irritated. While Irritated, the creature must spend 2ft of movement per foot moved when moving closer to the dragon and when it fails a D20 Test, it takes 9 (2d8) Psychic damage. At the end of its turn, it makes the same save, ending the effect on a success. If the dragon uses this effect while creatures are still affected by it, the creatures who were already affected end the effect on themselves and cannot be affected by this effect until the end of the current round.

Pounce. The dragon can move up to half its Speed, and it makes one Rend attack.

Spellcasting. The dragon casts Tasha's Mind Whip (level 3 version).