Huge dragon, any lawful

Armor Class: 19 (natural armor)

Hit Points: 225 (18d12 + 108) 18d12+108

Speed: 40 ft , fly: 80 ft , swim: 40 ft

STR

23 +6

DEX

14 +2

CON

23 +6

INT

18 +4

WIS

15 +2

CHA

17 +3

Saving Throws: Dex +7, Con +11, Wis +7, Cha +8

Skills: Deception +8, Insight +7, Perception +7, Persuasion +8, Stealth +7

Damage Resistances: necrotic, poison

Damage Immunities: acid

Senses: blindsight 60 ft., darkvision 120 ft., passive Perception 22

Languages: Draconic; understands Common, Infernal, Naga but can't speak

Challenge Rating: 15

Deathbringer Regent (Promo) by Chris Rallis

Actions

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: +11 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) piercing damage plus 4 (1d8) acid damage.
Claw. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.
Tail. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 15 (2d8 + 6) 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 16 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.
Rotting Breath (Recharge 5–6). The dragon exhales decaying gout of toxic miasma in a 60-foot cone. Each creature in that area must make a DC 18 Constitution saving throw, taking 27 (6d8) necrotic damage and 27 (6d8) poison damage on a failed save, or half as much damage on a successful one. A creature that takes damage from the breath can't regain hit points until the start of dragon's next turn.

Legendary Actions

The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action 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.
  
• Cloudkill (Costs 2 Actions). All creatures within 50 feet of the dragon must make a DC 18 Constitution saving throw, suffering 10 (3d6) poison damage on a failed save, or half as much of a successful one.
  
• Tail Attack. The dragon makes a tail attack.

Regional Effects

The region containing a legendary silumgar dragon is warped by the dragon's magic, which creates one or more of the following effects:

• The land within 6 miles of the lair takes twice as long as normal to traverse, since the plants grow thick and twisted, and the swamps are thick with reeking mud.
• Water sources within 1 mile of the lair are supernaturally fouled. Enemies of the dragon that drink such water regurgitate it within minutes.
• Stinging bugs are aggressive and the air is heavy with the odor of rot within 6 miles of the lair.

Suggested Environments

Environment. Jungle, Swamp, Urban