Dragon control . Moros can control any dragon and tell them what actions to take of cr 16 or below 

Dragon immunity . Moros is immune to any dragons spells and abilities of cr 16 or below 

Legendary Resistance (3/Day). If moros fails a saving throw, he can choose to succeed instead.

Dragon transformation When moros is reduced to 0 hit points, they don't fall unconscious. Instead, their draconic blood explodes into an uncontrolled transformation. Their body swells, their human-like skin splits to reveal hardened scales, and they grow horns and tail.Moros Intelligence and Charisma and wisdom  scores drop to 6 (-2) as their animalistic nature takes over, while their Strength and Constitution increase by 2. They regain half there hit points and gain access to their Mythic Actions. And can only use his mythic form actions nothing else

Spellcasting. Moros is a 11-level spellcaster. Its spellcasting ability is charisma (spell save DC 17, +5 to hit with spell attacks). Moros has following spells prepared:
Cantrips (at will): fire bolt
1st level (2 slots): burning hands 

3rd level (3 slots): fireball, lightning bolt 

4th level (1 slots): ice storm 

5th level (1 slots): summon dragon
6th level (1 slots): chain lighting 

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long sword . Melee Weapon Attack: +5 to hit, reach 5 ft., 2 target. Hit: 12 (2d8 + 3) slashing damage.

long bow . Ranged Weapon Attack: +4 to hit, range 15/555 ft., 1 target. Hit: 8 (2d6+ 2). Piercing damage 

can not be used unless in mythic form————————————————————————————

Claw swipe . Melee Weapon Attack: +7 to hit, reach 5 ft., 3 target. Hit: 12 (2d10 + 3) slashing damage.

 Breath weapon (Recharge 5–6). Moros exhales an elemental blast in a 60-foot cone. Each creature in that area must make a DC 19 Constitution saving throw, taking 54 (12d8) cold, fire, or acid whichever they are vulnerable to if they are not vulnerable to any it’s random damage on a failed save, or half as much damage on a successful one.

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Dagger . Melee Weapon Attack: +3 to hit, reach 5 ft., 1 target. Hit: 4 (2d4+ 1) slashing damage or Ranged Weapon Attack: +3 to hit, range 15/45 ft., 1 target. Hit: 8 (2d4+ 2). Piercing damage 

Heal . Moros heals one dragon in 50ft of him for 2d8 health 

can not be used unless in mythic form————————————————————————————

pounce . Moros runs half half his speed then uses a claw attack 

dragon guardian . Whenever Moros is hit by a attack he can make a dragon in 50ft of him take that damage instead 2 times a battle 

snag . Whenever a creature uses the disengage action Moros can do a opportunity attack and if it hits it does double damage and reduces the creature’s speed to zero for the round 

can not be used unless in mythic form————————————————————————————

dragon resistance . Whenever Moros is hit by a attack he can take 2d10 less damage 2 times a battle 

Moros can take 9 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. Moros doesn’t regain spent legendary actions at the start of its turn.

RAZOR NET (Costs 2 Actions) Moros fires a net from their launcher at an enemy within 60 feet. On a hit, the target becomes restrained. The net is made of finely spun mithral wire lined with razors, and as the target struggles, the razors cut deeper. The target takes 2d6 slashing damage at the start of each of their turns while restrained. And at the start of Moros turn he can choose to pull the restrained creature 10ft towards him A creature can escape the net with a successful DC 18 Strength check as an action

summon wyrm (Costs 1 Actions) Moros summons a dragon wyrmling to fight with him 

Moros can take 7 mythic actions, choosing from the options below. Only one mythic action option can be used at a time and only at the end of another creature's turn. Moros doesn’t regain spent mythic actions at the start of its turn

Primordial Surge (Costs 2 Actions). The half-dragon, driven by instinct, momentarily empowers its allies. It releases a terrifying roar that instills a surge of aggression in its summoned creatures. All allied creatures within 60 feet of the half-dragon gain advantage on attack rolls and can move up to their speed as a reaction for the round