Mornujhar, Exarch of Tiamat (Black)

MORNUJHAR
Medium humanoid (dragonborn, mythic), chaotic evil

Armour Class 22 (godplate armour)
Hit Points 315 (21d8 + 147)
Speed 40 ft., fly 80 ft., swim 40 ft.

Saving Throws Dex +9, Con +14, Wis +9, Cha +11
Skills Perception +16, Stealth +9
Damage Immunities acid
Damage Resistances cold, fire and lightning
Senses blindsight 60 ft., darkvision 120 ft., passive Perception 26
Languages Common, Draconic, Supernal
Challenge 21 (33,000 XP)

Amphibious. Mornujhar can breathe air and water.

Assassinate. During his first turn, Mornujhar has advantage on attack rolls against any creature that hasn’t taken a turn. Any hit he scores against a surprised creature is a critical hit.

Dragonborn Fury.  While bloodied (<50% hit points) Mornujhar has advantage on attack rolls.

Evasion. If Mornujhar is subjected to an effect that allows him to make a Dexterity saving throw to take only half damage, he instead takes no damage if he succeeds on the saving throw, and only half damage if he fails.

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

Sneak Attack. Once per turn, Mornujhar deals an extra 14 (4d6) damage when he hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally that isn’t incapacitated and Mornujhar doesn’t have disadvantage on the attack roll.

Stalk. On each of his turns, Mornujhar can use a bonus action to take the Dash, Disengage, or Hide action. If he has any form of concealment or breaks line of sight Mornujhar makes his Hide check with advantage.

ACTIONS

Multiattack. Mornujhar makes three black iron falchion attacks. He may also use dragon breath or toxic cloud (if available) but not both.

Black Iron Falchion. Melee Weapon Attack: +15 to hit, reach 5 ft., one target. 

Hit: 19 (2d10 + 8) slashing damage plus 9 (2d8) acid damage.

Dragon Breath (1/Day). Mornujhar exhales acid in a 90-foot cone. Each creature in that cone must make a DC 22 Dexterity saving throw, taking 67 (15d8) acid damage on a failed save, or half as much damage on a successful one.

Toxic Cloud (Recharge 4–6). Mornujhar exhales a billowing cloud of acidic gas in a 20-foot sphere centred​ on himself. Each creature in that area must make a DC 20 Constitution saving throw, taking 21 (6d6) acid and 21 (6d6) poison damage on a failed save, or half as much damage on a successful one.  Any creature (except Mornujhar) that ends its turn in the cloud takes 10 acid damage and is weakened only doing half damage with weapons that depend on Strength (save ends). The cloud blocks line of sight for all creatures.

LEGENDARY ACTIONS