monster

Hollow Dragon

CR 18

Huge Undead, Any Alignment

Reveal Stat Block

Armor Class

19 (natural armor)

Hit Points

241 (21d12 + 105)

Speed

40 ft., fly 80 ft.

str

dex

con

int

wis

cha

Traits

Legendary Resistance (3/Day).If the hollow dragon fails a saving throw, it can choose to succeed 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 19, 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.The hollow dragon makes one Bite attack and two Claw attacks, and it can use Sapping Presence.

Bite.mw 12 to hit, reach 10 ft., one target. ({@damage 2d10 + 6) piercing damage plus 9 (2d8) radiant damage.

Claw.mw 12 to hit, reach 5 ft., one target. ({@damage 2d6 + 6) slashing damage.

Sapping Presence.Each creature of the hollow dragon's choice within 60 feet of it must make a 19 Wisdom saving throw. On a failed save, the creature's speed is halved and it has disadvantage on attack rolls until the end of its next turn. On a successful save, the creature is immune to this hollow dragon's Sapping Presence for 24 hours.

Radiant Breath 5.The hollow dragon exhales radiant flames in a 60-foot cone. Each creature in that area must make a 19 Dexterity saving throw, taking 54 (12d8) radiant damage on a failed save, or half as much damage on a successful one.

Legendary Actions.The creature can take 3 legendary actions...

Claw.The hollow dragon makes one Claw attack.

Ghostly Binding (Costs 2 Actions).The hollow dragon creates ethereal bindings around a creature it can see within 60 feet of it. The target must succeed on a 19 Strength saving throw or be restrained until the end of the dragon's next turn.

Booming Scales (Costs 3 Actions).A sudden loud ringing noise, painfully intense, erupts from the hollow dragon's frame. Each creature within 10 feet of the hollow dragon must make a 19 Constitution saving throw, taking 24 (7d6) thunder damage on a failed save, or half as much damage on a successful one.

Hollow Dragon

Unlike dragons who explore the magic of undeath for power, some metallic dragons see undeath as a means to pursue a noble purpose. For the sake of protecting an artifact or fulfilling an oath, a dragon might transform into a hollow dragon, accepting undeath until that purpose is fulfilled.

As the name suggests, a hollow dragon is the husk of a metallic dragon's hide, filled with radiant energy. Depending on the dragon's original kind, that energy might take the appearance of flames, lightning, or misty vapors.

Hollow dragons don't suffer distractions from their undying purpose. So powerful is their drive that their bodies reconstitute if destroyed.

When they fulfill their purpose, most hollow dragons embrace the death they have staved off for so long. But others seek new tasks to sustain themselves—or cling to undeath out of sheer stubbornness or habit.