Cú Chulainn — Hound of Ulster
When the Hound of Ulster crosses out of the heroic age, the battlefield stops feeling historical and starts feeling mythic.
Cú Chulainn remains a hero of Ireland’s deep mythic past rather than being rewritten as an ordinary fifteenth-century knight. He enters the campaign through an Otherworld crossing opened by an awakened geas. To him, only hours may have passed since an ancient conflict. To everyone else, he is a living legend whose obligations still carry supernatural force.
At a Glance
- Role: Mythic champion of Ulster
- Primary region: Ulster and the Irish Otherworld
- Status: Active through Otherworld crossing
- Campaign use: Mythic ally, tragic rival, geas-driven encounter
- Power: CR 15 legendary champion
Game Statistics
5.5e / 2024
Cú Chulainn — CR 15 Medium Mythic Humanoid; AC 20; HP 220; Str 24, Dex 20, Con 22, Wis 16, Cha 18. Multiattack: three spear attacks. Ríastrad. Once per long rest for 1 minute gain resistance to bludgeoning, piercing and slashing damage and deal +2d8 damage once per turn. Gáe Bolga. Limited-use spear strike dealing 4d8+7 piercing; target must make DC 18 Con save or suffer a grievous wound reducing speed by 10 feet and preventing healing until treated. Geas-Bound. Advantage on saves against effects that would force him to knowingly break a geas; if he voluntarily breaks one, he becomes stunned until end of next turn and loses Ríastrad until next dawn.
Cú Chulainn, Hound of Ulster — 5e / 2014
Medium humanoid (mythic), chaotic good
Armor Class 20 (enchanted armour); Hit Points 220; Speed 40 ft.; Challenge 13 (10,000 XP; proficiency bonus +5).
STR 24 (+7), DEX 20 (+5), CON 22 (+6), INT 12 (+1), WIS 16 (+3), CHA 18 (+4).
Saving Throws Str +12, Dex +10, Con +11, Wis +8, Cha +9; Skills Athletics +12, Intimidation +9, Perception +8, Survival +8; Senses passive Perception 18; Languages Irish, Common.
Traits
Geas-Bound. He has advantage on saving throws against effects forcing him to knowingly violate one of his geasa. If he voluntarily breaks one, he is stunned until the end of his next turn and loses access to Ríastrad until the next dawn.
Legendary Resistance (2/Day). If Cú Chulainn fails a saving throw, he can choose to succeed instead.
Ríastrad (1/Long Rest). As a bonus action, Cú Chulainn enters a terrifying battle transformation lasting 1 minute, ending early if he falls unconscious. During it he has resistance to bludgeoning, piercing and slashing damage, and once on each of his turns one spear attack that hits deals an extra 9 (2d8) piercing damage.
Actions
Multiattack. Cú Chulainn makes three spear attacks.
Hero’s Spear. Melee or Ranged Weapon Attack: +12 to hit, reach 10 ft. or range 20/60 ft., one target. Hit: 12 (1d10 + 7) piercing damage in melee, or 10 (1d6 + 7) piercing damage when thrown. After a thrown attack, his legendary weapon returns to his hand at the end of the action.
Gáe Bolga (1/Day). Cú Chulainn makes one spear attack against a creature within reach. Hit: 25 (4d8 + 7) piercing damage. The target must succeed on a DC 18 Constitution saving throw or its speed is reduced by 10 feet and it cannot regain hit points until it receives magical healing or an appropriate curative ritual; the effect otherwise ends after a long rest. This is an original 2014 game expression of the legendary weapon, not an historical injury.
Reactions
Defiant Counterstroke. When a creature within 10 feet misses Cú Chulainn with a melee attack, he may make one Hero’s Spear attack against it.
Original 2014 mythic NPC conversion. The hero’s challenge rating is provisional and should be evaluated with Ríastrad, legendary resistance and allies; existing 2024/PF1e/3.5e versions remain preserved.
Pathfinder 1e
Cú Chulainn — CR 16 mythic human barbarian 8/fighter 6 with heroic template; hp 235; AC 29; mythic power, rage and exceptional spear attacks.
D&D 3.5e
Cú Chulainn — CR 16 human barbarian 8/fighter 6 with heroic template; hp 215; AC 27; Greater Weapon Focus (spear), Improved Critical, Power Attack and heroic rage abilities.
What Is Cú Chulainn Doing Right Now?
A geas tied to an Ulster boundary stone has awakened, opening a road into an ancient battlefield. Cú Chulainn crossed it pursuing an enemy who may no longer exist in mortal Ireland.
Modern rulers want to claim him as symbol. He has little interest in fifteenth-century legitimacy and cares far more about whether current people honour the obligations attached to his land and kin.
Encounters
- Cú Chulainn challenges a champion under rules nobody has used for centuries.
- A geas forces the party and hero toward opposite duties.
- The party must explain that the war he remembers ended ages ago.
- An enemy deliberately creates a situation where honour and survival conflict.
Personality, Appearance and Manner
Proud, intensely loyal, quick to anger and capable of startling generosity. His tragedy is that honour and supernatural obligation can make the best choice impossible.
He appears as a heroic-age warrior rather than in fifteenth-century armour, making his Otherworld origin obvious.
Relationships and Influence
- Ulster: identity and loyalty more important than modern boundaries.
- Otherworld powers: sources of gifts, geasa and impossible consequences.
- Irish rulers: tempted to use his return politically.
- Adventurers: potential guides to a world he does not recognise.
Equipment and Possessions
- Gáe Bolga
- Heroic spear and sword
- Chariot gear
- Old armour
- Tokens bound to geasa
Using This NPC at the Table
Use him sparingly. Cú Chulainn should feel like an event with obligations attached, not a high-level hireling who solves ordinary encounters.
Adventure Hooks
- The Awakened Geas: an old obligation becomes active again.
- The Hero’s Enemy: something followed him through the crossing.
- The Wrong King: rival rulers each claim his loyalty.
- The Battlefield Road: the Otherworld route remains open.
- The Impossible Choice: two geasa cannot both be honoured.
Connected Places and Powers
Mythical and Historical Context
Cú Chulainn belongs to the Ulster Cycle of Irish heroic legend, not a securely documented biography. His earlier name is Setanta, his war-cry and battle transformation are central to the tales, and the Gáe Bolga and geasa shape his tragic obligations. In this setting a legendary champion can endure and appear in 1454 through the world’s supernatural history; his survival is a campaign premise, not a statement about historical lifespan. See the historical Encyclopaedia Britannica survey of the legend. The four-edition powers here are original adaptations.
Sources and Adaptation
Consolidated from the Irish heroic tradition and the existing deep page. Repeated legacy stat blocks are removed; direct 1454 appearances are explicitly Otherworldly rather than ordinary chronology.
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