| Mod | Save | ||
|---|---|---|---|
| STR | 30 | +10 | +18 |
| DEX | 14 | +2 | +2 |
| CON | 27 | +8 | +16 |
| Mod | Save | ||
|---|---|---|---|
| INT | 16 | +3 | +3 |
| WIS | 30 | +10 | +18 |
| CHA | 18 | +4 | +12 |
Legendary Resistance (4/Day, or 5/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.
Living Stone. The dragon is indistinguishable from natural rock when motionless. While standing on stone, it gains resistance to all damage except force and psychic.
Horn of Cataclysm. The dragon’s massive horn is infused with earth-shaking power. On a successful gore attack, the dragon may cause a localized earthquake (20 ft. radius, DC 22 Strength save or be knocked prone and restrained by rubble).
Mythic Earth Magic. The dragon is a 9th-level spellcaster (Wisdom-based, save DC 26). It can innately cast, requiring no components:
-
At will: mold earth, detect magic
-
3/day each: wall of stone, move earth, stone shape, dispel magic
-
1/day each: earthquake, flesh to stone, imprisonment (burial form only)
Multiattack. The dragon makes three attacks: one bite, one claw, and one gore.
Bite. Melee Weapon Attack: +17 to hit, reach 15 ft., one target. Hit: 33 (4d10 + 10) piercing damage.
Claw. Melee Weapon Attack: +17 to hit, reach 10 ft., one target. Hit: 25 (3d8 + 10) slashing damage.
Gore (Horn). Melee Weapon Attack: +17 to hit, reach 10 ft., one target. Hit: 28 (4d8 + 10) piercing damage plus 18 (4d8) bludgeoning damage.
Acidic Mud Flood Breath (Recharge 5–6). Dexterity Saving Throw: DC 24, each creature in a 90-foot Cone. Failure: 126 (28d8) Acid and Bludgeoning damage on a failed save. On a failure, creatures are restrained in hardened acid-mud until they escape (DC 23 Strength check). Success: Half damage.
Petrifying Dust Storm (Recharge 6). The dragon exhales a storm of petrifying dust in a 90 ft. cone. Each creature must make a DC 23 Constitution save. On a failed save, the creature is restrained as stone creeps across its body. The creature must repeat the saving throw at the end of its next turn, becoming petrified on a second failure.
Legendary Action Uses: 3 (4 in Lair). Immediately after another creature’s turn, the dragon can expend a use to take one of the following actions. The dragon regains all expended uses at the start of each of its turns.
-
Horn Slam. The dragon makes a gore attack.
-
Detect. The dragon makes a Wisdom (Perception) check.
-
Stone Shards (Costs 2 Actions). The dragon causes jagged stone spikes to erupt in a 30 ft. radius within 120 ft. Each creature must succeed on a DC 23 Dexterity save or take 36 (8d8) piercing damage.
-
Seismic Roar (Costs 3 Actions). The dragon roars, causing a quake in a 60 ft. radius. Each enemy must succeed on a DC 23 Strength save or be knocked prone and restrained by falling rubble.
Description
Lore (Ancient Stone Dragon)
An Ancient Stone Dragon is a walking mountain. Its body is an armored fortress, its horn a weapon of world-breaking power, and its breath a dual apocalypse of acidic mud floods and petrifying dust storms. Whole cities in mountain valleys have been erased by the wrath of a single one.
Legends call them Avalanche Kings and Horned Cataclysms, for when they rise, mountains themselves march to war. Dwarves carve shrines begging their mercy; drow sacrifice to keep them from descending into the Underdark. Few mortals ever see one — for most who enter their domains are left either dissolved in mud or frozen in stone forever.
Lair and Lair Actions
Lair of the Ancient Stone Dragon
The Cataclysm Vault
The Ancient Stone Dragon’s lair is known as the Cataclysm Vault — a vast mountain hollowed from within, its walls carved with petrified victims, acidic mud rivers, and gemstone-veined cliffs. Caverns stretch for miles, collapsing and reshaping at the dragon’s command.
The lair feels like a cathedral to inevitability: every wall is carved by its claws, every statue is a frozen victim, and every tremor is its breath moving through the stone.
Terrain Features
-
Petrified Legion. Thousands of victims from past centuries stand frozen in stone throughout the cavern. Some form mock armies, while others are scattered like a battlefield of statues.
-
Rivers of Acidic Mud. Thick, glowing-green sludge flows through the lair, carving trenches through stone. The dragon swims in these rivers as easily as it flies.
-
Shattered Gem Thrones. The dragon’s “treasure” is not coins, but walls of crystal, gemstones, and ore veins carved into jagged thrones that glitter with eerie light.
-
Living Mountain. The cavern is unstable and shifts constantly. The dragon can cause collapses or raise new stone walls at will.
Lair Actions
On initiative count 20 (losing ties), the Ancient Stone Dragon can use one of the following effects:
-
Avalanche Collapse. The dragon causes part of the ceiling to collapse within 120 ft. Each creature in a 30 ft. radius must succeed on a DC 23 Dexterity save or take 45 (10d8) bludgeoning damage and be buried in rubble (restrained until freed).
-
Acidic Mud Surge. A 40 ft. line of acidic mud bursts forth from the ground. Each creature in the line must succeed on a DC 23 Dexterity save or take 36 (8d8) acid damage and be knocked prone.
-
Stone Shackles. The ground in a 30 ft. radius erupts into jagged stone chains. Each enemy must succeed on a DC 23 Strength save or be restrained until the start of the dragon’s next turn.
Regional Effects
The land within 12 miles of the Cataclysm Vault is devastated by the dragon’s presence:
-
Statues in the Wild. Entire valleys and tunnels are filled with petrified victims, still standing centuries later, forming ghostly armies of stone.
-
Earthquakes. The land suffers constant tremors. Entire villages may collapse into sinkholes or rockslides without warning.
-
Acid Springs. Natural springs bubble with corrosive mud that eats through metal, wood, and flesh.
-
Stone Dominion. The mountain itself feels alive. Travelers hear echoes of the dragon’s steps or roars in the stone, even miles away.
If the dragon dies, the mountain collapses catastrophically, burying the lair under miles of rubble and leaving behind a toxic wasteland of acid pits and unstable stone.
Comments