Tartarus — Primordial Abyss and Prison Below the Underworld
Hellenic primordial · Abyss · Cosmic prison · Titans · Depth · Boundary beneath Hades
Tartarus is both a primordial cosmic power and the terrible depth that bears its name. Hesiod places it among the earliest realities and describes the abyss as unimaginably far beneath the earth.
Tartarus at a Glance
| Tradition | Hellenic |
|---|---|
| Divine role | Primordial depth, imprisonment, cosmic boundaries and containment of defeated powers |
| Game alignment | Neutral |
| Suggested domains | Grave, Order, Twilight |
| Sacred signs | Bottomless shafts, bronze gates, echoing chains, pressure without air and darkness that seems physically heavy |
| Parentage / origin | Primordial; present among the earliest cosmic powers |
| Divine kin / relations | Gaia and Chaos belong to the same primordial opening of the cosmos; later divine generations use Tartarus as a prison |
| Pantheon plane | Primordial depth associated with the Tarterian Depths; Hellenic pantheon centred on Arborea |
Divine Mechanics
Encounter role: Prison-maker / terrain and containment primordial. These are original campaign statistics for compatibility; each edition tab is standalone.
Tartarus, Greater Primordial — Gargantuan Celestial, Neutral; suggested CR 35.
| Armor Class | 29 | Hit Points | 820 |
|---|---|---|---|
| Speed | 40 ft., burrow 120 ft. | Proficiency Bonus | +10 |
| STR | 30 (+10) | DEX | 16 (+3) |
| CON | 30 (+10) | INT | 26 (+8) |
| WIS | 30 (+10) | CHA | 26 (+8) |
Saving Throws Str +20, Con +20, Wis +20. Damage Resistances cold, fire, necrotic. Damage Immunities force, poison. Condition Immunities frightened, grappled, paralyzed, petrified, poisoned, prone, restrained. Senses truesight 500 ft.
Legendary Resistance (5/Day). If Tartarus fails a saving throw, it can choose to succeed instead.
Living Prison. Teleportation and planar travel within 180 feet of Tartarus fail unless Tartarus permits them or the effect is created by an artifact or deity of equal or greater rank.
Weight of the Deep. Hostile creatures within 120 feet have their Speed halved and cannot fly unless they succeed on a DC 27 Strength saving throw at the start of each turn.
Bronze Gate of the Deep (Recharge 5–6). Tartarus creates a 60-foot cube of black-bronze confinement within 240 feet. Creatures inside make a DC 28 Charisma saving throw; on a failure they are banished into an extradimensional prison until the end of Tartarus’s next turn and take 55 (10d10) psychic damage.
Mythic Trait — The Abyss Has No Bottom. The first time Tartarus reaches 0 hit points, it instead regains 410 hit points and the ground in a 180-foot radius becomes an endless descending prison for 1 minute. Creatures that fall Prone are also Restrained until they use an action to escape.
Greater Primordial; alignment N. Suggested divine encounter CR 34. Domains: Darkness, Earth, Law, Strength. Subdomains: Caves, Inevitable, Resolve, Night. Favoured weapon: heavy flail.
No Escape (Su). Teleportation and planar travel within 1 mile require a caster-level check against Tartarus’s divine DC.
Living Dungeon (Su). Once per day Tartarus may reshape stone, metal doors and passages in a 500-foot radius as though the entire area were affected by move earth, wall of stone and wall of iron simultaneously.
Greater Primordial; Divine Rank 18; alignment N. Portfolio: primordial depth, imprisonment, cosmic boundaries and containment. Domains: Earth, Law, Strength. Favoured weapon: heavy flail.
Appropriate salient divine abilities include Alter Reality, Divine Earth Mastery, Divine Shield, Mass Divine Blast and Travel.
Absolute Prison. Within its divine aura, Tartarus may suppress teleportation, ethereal travel and extradimensional escape by creatures with fewer divine ranks.
The Deepest Place
Hesiod presents Tartarus both as a primordial entity and as the immense abyss beneath the earth. The Titans are cast into this depth after their defeat, and later myths continue to use Tartarus as a place of extraordinary imprisonment.
Tartarus is deeper than Hades in cosmological terms and should not be treated as simply another name for the ordinary land of the dead. Its defining function is cosmic containment.
Worship in the Living World
Tartarus is feared and invoked more often than loved. Jailers, oath-keepers and secret societies may use its name in binding rites, while prisoners and rebels pray never to be sent where no road returns.
Tartarus and the Tarterian Depths
The primordial Tartarus is the mythic source behind the campaign’s Tarterian depths and prison-realms. Its relationship to Carceri is one of deep cosmological correspondence rather than a claim that every ancient Greek description maps neatly onto one later planar taxonomy.
What Is Tartarus Doing Now?
Prisons across several kingdoms have begun developing impossible lower levels. Staircases continue below their foundations into older stone, and wardens hear chains moving where no cells were built.
Tartarus is closing gaps in an ancient prison network. The danger is that mortals have unknowingly built dungeons on top of seals that were never meant to be reopened.
Domain Spells and Divine Gifts
1st: command, earth tremor · 2nd: hold person, silence · 3rd: glyph of warding, slow · 4th: stone shape, banishment · 5th: wall of stone, hold monster · 6th: forbiddance, wall of thorns · 7th: forcecage, reverse gravity · 8th: antimagic field, maze · 9th: imprisonment, gate.
Divine Relic — The Black-Bronze Key
An original game relic that can lock any mundane door without a visible mechanism. Once per long rest it can cast arcane lock without components. Once per week it can create a forcecage, but the cage cannot be dismissed early by the bearer.
Use Tartarus Tonight
- The New Basement: a city prison gains a stairway no architect built.
- The Titan Chain: an earthquake exposes a link large enough to bridge a river.
- The Door That Locks Gods: a bronze gate closes behind a divine messenger.
- The Escaped Name: a prisoner’s name vanishes from every record when they disappear below.
Relationships
Gaia: Earth stands above the primordial depth and in some traditions participates in the generation of beings later confined there.
Zeus: the Olympian king uses Tartarus as the ultimate prison after the Titan war.
Cronus: the defeated Titan king is bound to Tartarean imprisonment in the post-Titanomachy order.
Hades: lord of the dead, but not sovereign of Tartarus in the simple sense of an ordinary prison governor.
Deep Link Dive
Hellenic Pantheon
Return to the Hellenic divine directory.
The Tarterian Depths
Enter the campaign’s prison-plane treatment of the deep.
Cronus
Follow the defeated Titan king into the consequences of the Titan war.
Hades
Distinguish the land of the dead from the deeper cosmic prison.
Salient Divine Abilities
Continue into the site’s divine-rank rules.
Sources and Licensing
Hesiod’s Theogony is the principal ancient source for Tartarus as both primordial power and immeasurable depth, including the imprisonment of defeated Titans.
Mythological material is paraphrased from ancient literary traditions. Encounter statistics, relics, spell selections and adventure material are original fantasy-RPG adaptations. Edition names identify rules compatibility.
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