Huge Dragon, Chaotic Evil
Armor Class 19 (natural armor)
Hit Points 195 (17d12 + 85)
Speed 40 ft., fly 80 ft., burrow 50 ft.
STR
20 (+5)
DEX
21 (+5)
CON
21 (+5)
INT
12 (+1)
WIS
10 (+0)
CHA
22 (+6)
Saving Throws DEX +11, CON +11, CHA +12
Skills Perception +11, Stealth +7
Damage Resistances Necrotic, Psychic, Radiant, Thunder; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks
Damage Immunities Force
Condition Immunities Frightened, Grappled, Petrified, Restrained
Senses Blindsight 60 ft., Darkvision 120 ft., Passive Perception 18
Languages Common, Draconic
Challenge 17 (18,000 XP)
Proficiency Bonus +6
Traits

Amphibious. The dragon can breathe air and water.

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

Natural Destroyer. The dragon does 3 times damage to structures

Forceful Presence. The dragon can fit through gapes 1 square foot or smaller, and while doing so destroys part of the wall that the hole is on

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.

Mystic Breath (Recharge 5–6). The dragon exhales Magic in a 60-­foot line that is 5 feet wide. Each creature in that line must make a DC 18 Dexterity saving throw, taking 54 (12d8) Force damage on a failed save, or half as much damage on a successful one.

Legendary Actions

The dragon 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. The dragon makes a Wisdom (Perception) check.

Tail Attack. The dragon makes a tail attack.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 10 feet of the dragon must succeed on a DC 19 Dexterity saving throw or take 13 (2d6 + 6) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

Lair and Lair Actions

Gray dragons dwell in Caverns on the edges of cliffs. A gray dragon’s lair is a massive cave, or ruin that has lots of nooks and crannies, providing spaces for the dragon to escape, and where its victims can't go through. The lair is littered with the ruined bones of previous victims and the fly-ridden carcasses of fresh kills, watched over by crumbling statues. Earth elementals, animated items, and clay golems infest the lair, which is filled with the smell of emptiness.

Lair Actions

On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can’t use the same effect two rounds in a row:

  • Rocks and rubble that the dragon can see within 120 feet of it will spring to life and fly toward the creature. Any creature within 30 feet of the rocks must succeed on a DC 15 Strength saving throw or be knocked prone and take 10 damage.
  • Magical darkness spreads from a point the dragon chooses within 100 feet of it, filling a 30-foot-radius sphere until the dragon dismisses it as an action, uses this lair action again, or dies. The darkness spreads around corners. A creature with darkvision can’t see through this darkness, and nonmagical light can’t illuminate it. If any of the effect’s area overlaps with an area of light created by a spell of 3rd level or lower, the spell that created the light is dispelled.

Regional Effects

The region containing a legendary gray dragon’s lair 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 rocks jut up from the ground, and chasms grow, trying to engulf them.
  • Fog lightly obscures the land within 6 miles of the lair.

If the dragon dies, vegetation remains as it has grown, but other effects fade over 1d10 days.

Previous Versions

Name Date Modified Views Adds Version Actions
3/1/2022 9:38:02 PM
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Habitat: MountainUnderdark

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