Adult Kendermore Red Dragon (Redux)

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

Searing Scales. When a creature without fire resistance starts its turn within 5 feet of the dragon, it takes 4 (1d8) fire damage and catches fire and begins to burn. Until someone takes an action to douse the fire, the creature takes 3 (1d6) fire damage at the start of each of its turns. 

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: +17 to hit, reach 15 ft., one target. Hit: 24 (4d6 + 10) piercing damage plus 14 (4d6) fire damage.

Claw. Melee Weapon Attack: +17 to hit, reach 10 ft., one target. Hit: 21 (2d10 + 10) slashing damage.

Tail. Melee Weapon Attack: +17 to hit, reach 20 ft., one target. Hit: 23 (2d12 + 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 21 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.

Fire Breath (Recharge 5–6). The dragon exhales fire in a 65-foot cone. Each creature in that area must make a DC 23 Dexterity saving throw, taking 83 (24d6) fire damage on a failed save, or half as much damage on a successful one.

Innate Spellcasting. The dragon's spellcasting ability is Charisma (spell save DC 22, +14 to hit with spell attacks). The dragon can innately cast the following spells, requiring only verbal components:

At Will: control flames, thaumaturgy, mind sliver, bane, heat metal, scorching ray, fireball

2/day each: suggestion, hypnotic pattern, haste, dominate person, erupting earth, locate creature

4/day: move earth, power word pain, fire storm

Manipulate Flames. As a reaction to a creature within 40 feet of the dragon and within 50 feet of a flame hitting it with an attack or harmful spell, the dragon may force the attacker to succeed on a DC 20 Dexterity saving throw or take 6 (1d12) fire damage and catch fire. Until a creature takes an action to douse the fire, the creature takes 5 (1d10) fire damage at the start of each of its turns.

The dragon 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 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.

Billowing Wings. The dragon shrouds itself in smoke, then immediately moves up to half its speed. The area in 30 foot radius becomes heavily obscured until the end of the dragon's next turn.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 15 feet of the dragon must succeed on a DC 24 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.