Huge Undead, Any Evil Alignment
Armor Class 15 (natural armor)
Hit Points 150 (16d12 + 108)
Speed 40 ft., Climb 40 ft., Fly 80 ft.
STR
22 (+6)
DEX
8 (-1)
CON
23 (+6)
INT
2 (-4)
WIS
9 (-1)
CHA
1 (-5)
Saving Throws CON +10, WIS +3
Skills Perception +13, Stealth +6
Damage Vulnerabilities Bludgeoning, Force
Damage Resistances Acid, Slashing
Damage Immunities Cold, Fire, Lightning, Necrotic, Piercing, Poison, Psychic
Senses Blindsight 60 ft., Passive Perception 9
Languages Understands all languages it knew in life but can't speak
Challenge 12 (8,400 XP)
Proficiency Bonus +4
Traits

Legendary Resistance (1/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Cadaverous Appearance. While the undead dragon is lying still, it is indistinguishable from a mundane corpse or pile of bones.  It can still be detected by detect evil and good spell or detect magic.

Undead Fortitude. If damage reduces the undead dragon to 0 hit points, it must take a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit.  On a success, the undead dragon drops to 1 hit point instead.

Reconstruction. When the hollow dragon is reduced to 0 hit points, its body breaks into nine pieces: two arms, two legs, two wings, a tail, a torso, and a head. Each piece is a Large object with AC 18, 27 hit points, and immunity to psychic and poison damage. After 1d6 days, if all pieces are still within 6 miles of each other, they all teleport to the location of the head piece and merge with it, whereupon the hollow dragon regains all its hit points and becomes active again.

Actions

Multiattack. When the undead dragon can use its Frightful Presence, it then makes two attacks: one with its bite and one with its claws.

Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) piercing damage plus 13 (3d8) necrotic damage.

Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Tail. Melee Weapon Attack: +10 to hit, reach 15 ft., one target. Hit: 15 (2d8 + 6) slashing 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 19 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. After each failed attempt to save against the effect, the DC lowers by 1 for all who are effected in range. 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) or (Recharge every other round). The undead dragon exhales necrotic energy in a 30-foot cone. Each creature in that area must make a DC 18 Constitution saving throw, taking 31 (7d8) necrotic damage on a failed save, or half as much damage on a successful one.   
If the target is missing any of its hit points, it instead takes 1d12 necrotic damage.  A creature that fails its saving throw has its hit point maximum reduced by an amount equal to the necrotic damage taken.  This reduction lasts until the creature finishes a short or long rest.  If the creature 's hit point maximum is reduced to 0 in this way, the creature dies.

Legendary Actions

The dragon can take 1 legendary action, 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.

Description

The odor of decay surrounds an undead dragon, whose visible bones and lack of flesh define it's silhouette. Necrotic energy burns and flows through its chest, mouth, and eyes, it arises from being animated by dark magic adhering joint to joint and reassembling dismantled version of its former self.

It heeds the summon of spellcasters who call them from it's lingering remains, awakened by stirrings of necromantic energy or the presence of corrupting evil. This energy motivates it to move and think in a rudimentary fashion, though only as a pale imitation of the way it behaved in life. It retains no connection to its past, although resurrecting it's body and soul, banishing the hateful undead spirit that empowers it.

It is raised by spell are bound to the will of their creator. They follow orders to the letter, never questioning the tasks their masters give them, regardless of the consequences. Because of their literal interpretation of commands and unwavering obedience, skeletons adapt poorly to changing circumstances. They can’t read, speak, emote, or communicate in any way except to nod, shake their heads, or point. 

Independent Undead Dragons temporarily or permanently free of a master’s control sometimes pantomime actions from their past lives, lying down on a pile of treasure, terrorizing livestock, flying endlessly, attack intruders in it's lair.

Undead Nature. The Undead Dragon doesn’t require air, food, drink, or sleep.

Lair and Lair Actions

An Undead Dragon’s Lair

Undead dragons lair almost anywhere, even in urban areas, deep underground or in a museum.

Independent Undead Dragons temporarily or permanently free of a master’s control sometimes pantomime actions from their past lives, lying down on a pile of treasure, terrorizing livestock, flying endlessly, attack intruders in it's lair.

Throughout the lair other objects & undead servants may become animated to carry out an echoing command or goal that the dragon is focused on.

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:

  • Animated Servants.  Near by Suits of armor, corpses or piles of bones animate to help the dragon complete it's mission, usually being kill or capture the intruders.

Monster Tags: undead

Habitat: ArcticCoastalDesertForestHillMountainSwampUrban

TheCmikePro

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