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Archives of Nethys

Archives of Nethys

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There is a Legacy version here.

Ancient Underworld Dragon

Underworld dragons make their homes close to fault lines, active or dormant volcanoes, and regions with natural seismic activities. Locations with hot springs and fume holes are particularly popular, as they provide many alchemical and magical ingredients. Aside from vaults stuffed with treasure, underworld dragon lairs are also laboratories, dedicated to uncovering secrets in cultivation, elements, magic, and any other mysteries of interest. Several underworld dragon families have operated such labs for tens of thousands of years.

Recall Knowledge - Dragon (Arcana): DC 37
Unspecific Lore: DC 35
Specific Lore: DC 32

Elite | Normal | Weak
Proficiency without Level

Ancient Underworld DragonCreature 16

Uncommon Gargantuan Arcane Dragon Fire 
Source Draconic Codex pg. 184
Perception +28; darkvision, scent (imprecise) 60 feet, smoke vision
Languages Common, Draconic, Petran, Pyric, Sakvroth
Skills Acrobatics +23, Arcana +25, Athletics +32, Crafting +29, Deception +27, Intimidation +29, Nature +24, Stealth +25, Survival +24
Str +8, Dex +3, Con +6, Int +5, Wis +4, Cha +5
Smoke Vision Smoke doesn't impair an underworld dragon's vision; they ignore the concealed condition from smoke.
AC 39; Fort +30, Ref +25, Will +28; +1 status to all saves vs. magic
HP 295; Immunities fire, paralyzed, sleep; Weaknesses earth 15
Countered by Water If the underworld dragon takes damage from a spell with the cold or water trait, the elemental magic of fire within them is momentarily dampened. Until the end of their next turn, they take a –1 circumstance penalty to attack rolls, and their jaws Strikes don't deal fire damage. This limitation ends if the dragon uses Exploding Red Breath.Fed by Wood When an underworld dragon is struck by a weapon made primarily of wood or affected by a spell with the plant or wood trait, the dragon's internal fiery essences are stoked with the added fuel. Their Exploding Red Breath recharges, and the fire damage from the dragon's jaws deals an additional die of damage until the end of the dragon's next turn.Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 35Sweltering Heat (arcane, aura, fire) 10 feet. Each creature that ends its turn in the aura must succeed at a DC 35 Fortitude saving throw or become fatigued while it remains in the aura.
Speed 40 feet, burrow 60 feet, fly 80 feet
Melee [one-action] jaws +32 [+27/+22] (magical, reach 15 feet), Damage 3d8+16 piercing plus 3d6 fireMelee [one-action] claw +32 [+28/+24] (agile, magical, reach 10 feet), Damage 3d6+16 slashing and GrabMelee [one-action] tail +30 [+25/+20] (magical, reach 25 feet), Damage 3d10+16 bludgeoning plus GrabArcane Innate Spells DC 37; 8th everlight, wall of fire; Cantrips (8th) detect magic
Greater Constrict [one-action] 3d8+9 bludgeoning, DC 37Adamantine Claws [one-action] (arcane, concentrate) Frequency one per hour; Effect The dragon infuses their body with adamantine. For the next minute, their melee Strikes are treated as adamantine and ignore half the Hardness of any object hit.Coiling Frenzy [two-actions] The dragon makes one claw Strike and one tail Strike in either order, each against the same target. If either Strike hits, the dragon can attempt to Grab the target with that limb as a free action. The dragon can have up to three creatures grabbed or restrained at a time; one in each of their front claws, and a last with their tail.Draconic Momentum The dragon recharges Exploding Red Breath whenever they score a critical hit with a Strike.Exploding Red Breath [two-actions] (arcane, fire) The dragon breathes a blast of fire that explodes in a 40-foot burst within 75 feet, dealing 22d6 fire damage (DC 42 basic Reflex save). Creatures that fail the save also take 4d6 persistent fire damage. The dragon can't use Exploding Red Breath again for 1d4 rounds.Scorch Earth [two-actions] (arcane, fire) The dragon plunges their body into the ground, Burrows up to their burrow Speed, and then scorches the land within a 60-foot emanation. Creatures underground or on the surface in the area take 8d6 fire damage (DC 37 basic Fortitude save). A creature that critically fails also becomes enfeebled 1 for 1 minute.

All Monsters in "Dragon, Underworld"

NameLevel
Adult Underworld Dragon11
Ancient Underworld Dragon16
Underworld Archdragon19
Young Underworld Dragon7

Dragon, Underworld

Source Draconic Codex pg. 183
Underworld dragons make their homes close to fault lines, active or dormant volcanoes, and regions with natural seismic activities. Locations with hot springs and fume holes are particularly popular, as they provide many alchemical and magical ingredients. Aside from vaults stuffed with treasure, underworld dragon lairs are also laboratories, dedicated to uncovering secrets in cultivation, elements, magic, and any other mysteries of interest. Several underworld dragon families have operated such labs for tens of thousands of years.

Dragon

Related Groups Dragon, Adamantine, Dragon, Barrage, Dragon, Bog, Dragon, Brine, Dragon, Cinder, Dragon, Cloud, Dragon, Conspirator, Dragon, Coral, Dragon, Crystal, Dragon, Delight, Dragon, Despair, Dragon, Diabolic, Dragon, Empyreal, Dragon, Executor, Dragon, Forest, Dragon, Fortune, Dragon, Horned, Dragon, Magma, Dragon, Mirage, Dragon, Mocking, Dragon, Oath, Dragon, Omen, Dragon, Phase, Dragon, Requiem, Dragon, Resurrection, Dragon, Rime, Dragon, Rune, Dragon, Sage, Dragon, Sea, Dragon, Sky, Dragon, Sovereign, Dragon, Stormcrown, Dragon, Time, Dragon, Umbral, Dragon, Vizier, Dragon, Vorpal, Dragon, Wailing, Dragon, Whisper, Dragon, Wish, Dragonet, Wyrmwraith
Dragons come in myriad forms, with many having magical abilities or connections to magic. Some dragons draw greater power from magic than others, allowing them to manifest abilities or alter their physiques with prolonged exposure to magic. These dragons become more powerful as they age and strengthen their connections with their magical origins. Scholars debate the classification of these dragons, with some preferring the name magical dragons and others using traditional dragons due to their connection to specific magical traditions. Regardless of their names, these dragons share a number of characteristics: their ability to tap into magical energies, intensified might and cunning as they grow older, and an inclination to hoard vast amounts of treasure and wealth.

Draconic Spellcasters

Each dragon features a sidebar on spellcasting dragons of that type. To make a dragon spellcaster, remove the dragon's Draconic Frenzy and Draconic Momentum abilities, and give them the spells outlined in their sidebar. You can swap out any number of these with other spells, provided you keep the same number of spells for each rank. You might also want to increase the dragon's Intelligence, Wisdom, or Charisma modifier by 1 or 2 to reflect their mastery of magic.

No Icon Underworld Dragon

Underworld dragon spellcasters tend to cast the following spells.

Young Underworld Dragon

Prepared Arcane Spells DC 25, attack +17; 3rd earthbind, fireball; 2nd knock, revealing light, resist energy; 1st carryall, enfeeble, force barrage; Cantrips (3rd) caustic blast, ignition, read aura, shield, telekinetic hand

Adult Underworld Dragon

Prepared Arcane Spells DC 30, attack +22; As young underworld dragon, plus 5th scouting eye, toxic cloud; 4th mirage, peaceful bubble, translocate; 3rd slow; Cantrips (5th) caustic blast, ignition, read aura, shield, telekinetic hand

Ancient Underworld Dragon

Prepared Arcane Spells DC 37, attack +29; As adult underworld dragon, plus 7th energy aegis, fiery body, mask of terror; 6th mislead, spellwrack, truesight; 5th mind probe; Cantrips (7th) caustic blast, ignition, read aura, shield, telekinetic hand

Underworld Archdragon

Prepared Arcane Spells DC 41, attack +33; As ancient underworld dragon, plus 10th cataclysm, remake; 9th detonate magic, metamorphosis; Cantrips (10th) caustic blast, ignition, read aura, shield, telekinetic hand