Adult Gloom Dragon

Huge dragon, neutral evil

Armor Class 18 (natural armor)

18 (natural armor) Hit Points 225 (18d12 + 108)

225 (18d12 + 108) Speed 40 ft., burrow 30 ft., fly 100 ft.

STR DEX CON INT WIS CHA 21 (+5) 10 (+0) 22 (+6) 17 (+3) 18 (+4) 19 (+4)

Saving Throws Dex +6, Con +12, Wis +10, Cha +10

Dex +6, Con +12, Wis +10, Cha +10 Skills Arcana +9, Insight +10, Perception +16, Stealth +6

Arcana +9, Insight +10, Perception +16, Stealth +6 Senses blindsight 60 ft., darkvision 120 ft., passive Perception 26

blindsight 60 ft., darkvision 120 ft., passive Perception 26 Languages Draconic

Draconic Challenge 19 (22,000 XP)

Aura of Gloom. There is a pervasive aura of permanent mist that wracks at the mind. When a creature comes within 20 feet of the adult gloom dragon or starts their turn within 20 feet they must make a DC 20 Wisdom save. If they fail, they are dampened in spirit and subtract 1d4 on attack rolls, ability checks, and skill checks so long as they remain within 10 feet of the adult gloom dragon. Once they leave the area they can reroll the save and end the effect on a success. On a successful save they become immune to Aura of Gloom for one minute.

Eternal Consumption. Whenever a Gloom Dragon eats a creature of its size or smaller, its souls is trapped in a tomb stone on its back. It takes one minute to eat a corpse and then grow the tomb stone. All information normally found on a tomb stone is found on the tomb stone on its back. The soul cannot be resurrected unless the Gloom Dragon is killed and the tomb stone smashed.

Legendary Resistance (3/day). If the adult gloom dragon fails a saving throw, it can choose to succeed instead.

Actions Multiattack. The dragon can use its frightful presence. It 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: 16 (2d10 + 5) piercing damage plus 31 (7d8) necrotic damage. Claw. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage. Frightful Presence. Each creature of the adult gloom dragon's choice that is within 120 feet of the adult gloom dragon and aware of it must succeed on a DC 18 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 adult gloom dragon's Frightful Presence for the next 24 hours. Tail. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage. Melancholy Breath (Recharge 5-6). The dragon exhales apathetic gas in a 60-foot cone. Each creature in that area must make a DC 20 Wisdom saving throw. If they fail, they get severely weighed down by gloom, causing them to be incapacitated and for them to have a speed of 0. This effect lasts for one minute. Each time an affected creature takes damage, the target can make another Wisdom saving throw. On a success, the effect ends.