Chaoticus Draconus (The Crimson Dragon)

Lava Resistant. Chaoticus Draconus can swim in lava and take no damage from it at all.

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

Untapped Rage. Upon Dropping below 200 HP Chaoticus Draconus channels for 1 turn to prepare to unleash a devastating breath attack. After this turn the Dragon's next breathe attack will be increased by (2d20+10) and its breath attack will also corrupt the terrain in a 30-foot arc around the dragon that deals (1d20) Radiant Damage per turn if you stand on it.

Chaotic Presence. Due to Chaoticus Draconus's Immense power and embodiment of strength and chaos each party member gains a temporary +6 in strength whist in 700 feet of the dragon. However, this forces a DC 19 WIS save which if fails corrupts the minds of the party members who failed and will temporarily switch their alignment to whatever the alignment of Chaoticus Draconus is and will force them to follow the dragon's commands and wishes how ever good or evil they are. This can only be reversed if either Chaoticus Draconus releases them freely or is killed, however, every 3 turns anyone who is effected by Chaotic Presence's mind domination must make a DC 21 WIS save to break free from the mind spell or still be controlled by Chaoticus Draconus. On a successful save the party members just gain a +6 in strength.

Reign of Anger. The Crimson dragon gains a bonus in strength for every 100 damage it takes. Recommended Strength to health ratio. 100 = +1 200= +3 300= +5 400= +7 500= +9 600= + 11.

Chaotic Banshiment. Chaoticus Draconus's banishment to the abyss has allowed itself to soak in Chaotic energies and gives a +2 in every stat to everyone with a chaotic alignment. However, being reduced to 0 hp by Chaoticus Draconus forces a save Vs death saving throw and if you fail rather then dying you become a soulless vessel for the Chaotic energies of the realm. The vessel then will follow all of Chaoticus Draconus's commands and has the same stats as the original player but also gains +10 in strength. Once this process occurs the only way to bring the player back is to kill the soulless vessel and then purify the corpse of the player. However, if Chaoticus Draconus dies while the vessel remains unpurified the vessel is destroyed permanently and the player is permanently dead.

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

Bite. Melee Weapon Attack: +20 to hit, reach 15 ft., one target. Hit: 23 (4d10 + 8) piercing damage plus 9 (2d8) fire damage.

Claw. Melee Weapon Attack: +20 to hit, reach 10 ft., one target. Hit: 21 (4d10 + 7) slashing damage.

Tail. Melee Weapon Attack: +20 to hit, reach 20 ft., one target. Hit: 31 (5d10 + 8) bludgeoning damage.

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

Breath Weapons (Recharge 5–6). Chaoticus Draconus uses one of the following breath weapons. 

Arc of Chaos: Chaoticus Draconus exhales chaotic energies in a 90-foot arc that is 15 feet wide. Each creature in that arc must make a DC 22 CON saving throw, taking 98 (15d10+2) radiant damage on a failed save and ignites the target, or half as much damage on a successful one and is not ignited.

Voice of Chaos: Chaoticus Draconus releases a screech of chaotic energy in a cone that is 180 feet wide that forces each player to take a DC 21 CON save taking 78 (14d10+5) Force damage and are knocked back by 90 feet in the opposite direction of Chaoticus Draconus. On a successful save they take half damage but are still knocked back.

Chaotic Divide (Recharge 5-6).  Chaoticus Draconus uses Chaotic Divide.

Chaoticus Draconus creates a blinding rift of red and flashing purple that forces every player within the realm besides the dragon to take a DC 19 CON save or they take 100 (20d10+4) Radiant damage and is Blinded for (1d4) turns on a successful save they take half damage and are not blinded.

Chaoticus Draconus 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. Chaoticus Draconus makes a Wisdom (Perception) check.

Tail Attack. Chaoticus Draconus makes a tail attack.

Gravity Reverse (Costs 2 Actions). Chaoticus Draconus reverses gravity near its current location. Each creature within 35 feet of Chaoticus Draconus must succeed on a DC 23 Dexterity saving throw or take 30 (7d8 + 8) bludgeoning damage and be knocked prone.

Chaotic Radiance. (Costs 3 Actions) Chaoticus Draconus exhales Chaotic Energy in a 50 foot-straight line that is 20 feet wide that deals, if the target fails a DC 20 CON Save 95 (18d10+5) Radiant Damage and ignites the target, however, the Breath deals half as much damage on a successful save and is the target is not ignited.