Gargantuan Dragon, Chaotic Evil
AC 18    Initiative +17 (27)
HP 297 (17d20 + 119)
Speed 40 ft., Climb 40 ft., Fly 80 ft.
Mod Save
STR 25 +7 +7
DEX 21 +5 +11
CON 24 +7 +7
Mod Save
INT 16 +3 +3
WIS 13 +1 +7
CHA 22 +6 +6
Skills Perception +13, Stealth +17
Immunities Necrotic
Senses Blindsight 30 ft., Darkvision 120 ft. (unimpeded by magical Darkness); Passive Perception 23
Languages Common, Draconic
CR 20 (XP 25,000, or 33,000 in lair; PB +6)
Traits

Resistances. See Living Shadow.

Legendary Resistance (4/Day, or 5/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.

Living Shadow. While in Dim Light or Darkness, the dragon has Resistance to damage that isn’t Force, Psychic, or Radiant.

Sunlight Sensitivity. While in sunlight, the dragon has Disadvantage on ability checks and attack rolls.

Actions

Multiattack. The dragon makes three Rend attacks.

Rend. Melee Attack Roll: +13, reach 15 ft. Hit: 16 (2d8 + 7) Slashing damage plus 5 (2d4) Necrotic damage.

Shadow Breath (Recharge 5–6). Dexterity Saving Throw: DC 21, each creature in a 90-foot Cone. Failure: 45 (13d6) Necrotic damage. Success: Half damage. Failure or Success: A Humanoid reduced to 0 Hit Points by this damage dies, and a Shadow rises from the corpse. The shadow is under the dragon’s control and shares the dragon’s Initiative count but acts immediately after the dragon.

Bonus Actions

Shadow Stealth. While in Dim Light or Darkness, the dragon takes the Hide action.

Legendary Actions

Legendary Action Uses: 3 (4 in Lair). Immediately after another creature’s turn, the dragon can expend a use to take one of the following actions. The dragon regains all expended uses at the start of each of its turns.

Conjure Darkness. The dragon casts Darkness (60-foot-radius Sphere, no Concentration required to maintain the spell), requiring no Material components and using Charisma as the spellcasting ability (spell save DC 20). The dragon can't take this action again until the start of its next turn. 

Pounce. The dragon moves up to half its Speed, and it makes one Rend attack.

Veil of Shadow. The dragon uses Shadow Stealth, and one creature of its choice that it can see within 10 feet of it takes 10 (3d6) Necrotic damage. The dragon can’t take this action again until the start of its next turn.

Description

Ancient shadow dragons survive in the depths of the world for centuries, growing like gathering darkness and biding their time before emerging to exert their will over the surface world. 

Shadow dragons are a constant threat at night and in the Underdark. Even worse, ancient shadow dragons can conjure their own darkness, allowing them to freely roam any land, an ominous dark cloud preceding them. 

Once enveloped in that dark cloud, a person has no hope. The dragon can see its blinded, unsuspecting prey who probably only think a thick fog has overtaken them. 

Lair and Lair Actions

Shadow Dragon Lairs

Shadow dragons lair in places of darkness and despair, such as accursed ruins, the depths of the Underdark, or the Shadowfell.

The region around a shadow dragon’s lair is twisted by its presence, creating the following effects:

Negative Energy Suffusion. Whenever a creature within 1 mile of the lair regains Hit Points from a spell, it subtracts 1d10 from the number of Hit Points regained.

Stifling Shadows. Within 1 mile of the lair, effects that normally create Bright Light instead create Dim Light, and creatures there have Advantage on Dexterity (Stealth) checks.

If the dragon dies or moves its lair elsewhere, these effects end immediately.

Habitat: Planar (Shadowfell)Underdark

TheHollowHunter

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