Ancient Underworld Dragon

The ancient underworld dragon is a creature of subterranean fire, its body a furnace fed by the deep places of the world. It rules the lightless caverns below with sweltering heat, and only water can briefly cool its inner blaze.

• 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, their jaws Strikes don't deal fire damage, and also lose their sweltering heat aura. This limitation ends if the dragon uses Breath Weapon.
• Fed by Wood When an underworld dragon is struck by a weapon made primarily of wood or affected by a spell with the plant trait, the dragon's internal fiery essences are stoked with the added fuel.

Level 16

Perception +28 · Senses darkvision, scent (imprecise) 60 feet, smoke vision · Languages Common, Draconic, Ignan, Terran, Undercommon · Skills Acrobatics +23, Arcana +25, Athletics +32, Crafting +29, Deception +27, Intimidation +29, Nature +24, Stealth +25, Survival +24

HP 295 · Immunities fire, paralyzed, sleep

Speed 40 feet, burrow 60 feet, fly 80 feet

• Melee Jaws [Single Action] +32 (reach 15 ft, Magical), Damage 3d10+16 piercing plus 3d6 fire
• Melee Claw [Single Action] +32 (reach 10 ft, Agile, Magical), Damage 3d10+16 slashing
• Melee Tail [Single Action] +32 (reach 25 ft, Magical), Damage 3d10+16 bludgeoning plus