Medium undead, Chaotic Evil
| Armor Class | 15 |
|---|---|
| Hit Points | 127 (17d8 + 51) |
| Speed | 30 ft. |
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 18 (+4) | 14 (+2) | 16 (+3) | 11 (+0) | 15 (+2) | 16 (+3) |
| Saving Throws | Con +7 |
|---|---|
| Skills | Perception +6 |
| Damage Vulnerabilities | — |
| Damage Resistances | cold; necrotic; poison |
| Damage Immunities | — |
| Condition Immunities | blinded; charmed; deafened; frightened; poisoned |
| Senses | Truesight 120 ft., passive Perception 16 |
| Languages | understands Common plus one other language but can't speak |
| Challenge | 10 |
While mounted and without the Incapacitated condition, the dullahan and its mount have Advantage on Dexterity saving throws, and the dullahan can force an attack targeted at its mount to target the dullahan instead.
The dullahan has Advantage on attack rolls against targets that have the Frightened condition.
The dullahan makes two attacks, using Beheading Blade or Fiery Skull in any combination, and uses Headless Wail.
Melee Attack Roll: +8, reach 5 ft. Hit: 9 (1d10 + 4) Slashing damage plus 11 (2d10) Necrotic damage. If the target is reduced to 0 Hit Points by this attack, it dies and its head is lopped off. The head rises as a Death's Head in the space of the target's corpse or in the nearest unoccupied space. The head is under the dullahan's control. The dullahan can control no more than seven heads at a time.
Ranged Attack Roll: +7, range 120 ft. Hit: 18 (4d8) Fire damage.
con DC 15, up to three creatures within 120 feet of the dullahan that aren't Constructs or Undead. Failure: 13 (2d12) Psychic damage, and the target has the Frightened condition until the start of the dullahan's next turn. Success: Half damage only.
Medium undead, Unaligned
| Armor Class | 16 (breastplate) |
|---|---|
| Hit Points | 135 (18d8 + 54) |
| Speed | 30 ft. |
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 18 (+4) | 14 (+2) | 16 (+3) | 11 (+0) | 15 (+2) | 16 (+3) |
| Saving Throws | Con +7 |
|---|---|
| Skills | Perception +6 |
| Damage Vulnerabilities | — |
| Damage Resistances | cold; lightning; poison |
| Damage Immunities | — |
| Condition Immunities | charmed; frightened; poisoned |
| Senses | truesight 120 ft., passive Perception 16 |
| Languages | understands the languages it knew in life but can't speak |
| Challenge | 10 |
If the dullahan is reduced to 0 hit points, it doesn't die or fall unconscious. Instead, it regains 97 hit points. In addition, it summons three death's head, one of each type, in unoccupied spaces within 5 feet of it. The death's heads are under the dullahan's control and act immediately after the dullahan in the initiative order. Additionally, the dullahan can now use the options in the "Mythic Actions" section. Award a party an additional 5,900 XP (11,800 XP total) for defeating the dullahan after it uses Headless Summoning.
If the dullahan fails a saving throw, it can choose to succeed instead.
The dullahan doesn't require air, food, drink, or sleep.
The dullahan makes two attacks.
Melee Attack Roll: +8 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage, or 9 (1d10 + 4) slashing damage if used with two hands, plus 11 (2d10) necrotic damage. If the dullahan scores a critical hit against a creature, the target must succeed on a DC 15 Constitution saving throw or the dullahan cuts off the target's head. The target dies if it can't survive without the lost head. A creature that doesn't have or need a head, or has legendary actions, instead takes an extra 27 (6d8) slashing damage.
Ranged Spell Attack Roll: +7 to hit, range 120 ft., one target. Hit: 14 (2d10 + 3) fire damage.
The dullahan makes one attack.
Each creature of the dullahan's choice within 30 feet of it must succeed on a DC 15 Wisdom saving throw or become frightened of the dullahan until the end of its next turn.
The dullahan moves up to its speed without provoking opportunity attacks and makes one Battleaxe attack with advantage. If the attack hits, but is not a critical hit, the attack deals an extra 27 (6d8) necrotic damage.