Shadow Dragon
Huge Dragon, Chaotic EvilAC 16
HP 189 (18d12 + 72)
Speed 40 ft., climb 40 ft., fly 80 ft.
STR
21 (+5)
Save +5
DEX
19 (+4)
Save +9
CON
18 (+4)
Save +4
INT
14 (+2)
Save +2
WIS
12 (+1)
Save +6
CHA
18 (+4)
Save +4
Saving Throws DEX +9, WIS +6
Skills Perception +11, Stealth +14
Resistances See Living Shadow
Immunities Necrotic
Senses Blindsight 30 ft., Darkvision 120 ft., Passive Perception 21
Languages Common, Draconic
CR 13
Traits
Legendary Resistance (3/Day, or 4/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: +10, reach 10 ft. Hit: 12 (2d6 + 5) Slashing damage plus 3 (1d6) Necrotic damage.
Shadow Breath (Recharge 5+). dex 17, each creature in a 60-foot Cone. Failure: 35 (10d6) 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
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.