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Open Dungeons A free fantasy roleplaying game

27 monsters found

Abyssal Dredge

HP: 245 AC: 16 DR: 5 Attack: 2d10+6, 2d10+6
The floor of the abyss given ambulatory form - heavy, slow, and patient in the way geology is patient. It senses vibration through ground and deep water, and it does not experience pain.

Ancient Black Dragon

HP: 364 AC: 20 DR: 3 Attack: 3d10+9, 2d10+9, 2d10+9
An ancient black dragon, a thing of malice grown vast amid the muck and the dead. Centuries in its drowned domain have made it cunning and utterly without mercy; it rules its swamp through terror and decay, its hoard half-sunk in acid pools only it can wade. To cross a black and survive is to […]

Ancient Blue Dragon

HP: 357 AC: 20 DR: 3 Attack: 3d10+9, 2d10+9, 2d10+9
An ancient blue dragon, a patient tyrant that has outlasted the kingdoms which once mapped its desert. It orchestrates its domain like a game of stones, manipulating the lesser creatures of the wastes into serving its whims and striking only when the outcome is already certain. Its hoard of sapphires and storm-glass is arranged as […]

Ancient Green Dragon

HP: 346 AC: 20 DR: 3 Attack: 3d10+9, 2d10+9, 2d10+9
An ancient green dragon, a spider at the center of a web spun across centuries. It has outlived dynasties by setting them against one another, ruling whole regions through proxies who never suspect the forest itself is listening. By the time anyone realizes a green has been guiding their downfall, the trap has already closed.

Ancient Red Dragon

HP: 412 AC: 20 DR: 3 Attack: 3d10+9, 2d10+9, 2d10+9
An ancient red dragon, a living catastrophe whose name is a curse handed down for generations. Centuries of conquest have bloated both its body and its vanity; it sleeps atop a mountain of plundered gold deep within a caldera and wakes only to crush the upstarts who imagine they could take it. To a red, […]

Ancient White Dragon

HP: 388 AC: 20 DR: 3 Attack: 3d10+9, 2d10+9, 2d10+9
An ancient white dragon, a primordial terror of the deep cold whose territory spans whole ranges of ice. Age has made it vast and patient in the hunt but no less feral; it rules its frozen domain by being the largest and hungriest thing in it. Its lair is a cathedral of ice studded with […]

Argentinosaurus

HP: 450 AC: 16 DR: 4 Attack: 4d10+7
The largest creature ever to walk the earth, a hundred feet of long-necked titan whose footfalls register as distant earthquakes. It fears nothing, because nothing its size has ever needed to. It crosses the inland plains in herds whose passage is mapped by the dust they raise and the rivers they drink dry, and predators […]

Ash Tyrant

HP: 351 AC: 18 DR: 5 Attack: 2d10+8, 2d6+8, 2d8+8
Ancient dragons with scales that glow like molten metal, their massive wings and powerful builds make them the most feared of their kind. These arrogant tyrants consider themselves kings of all they survey, their fiery breath capable of reducing entire villages to ash and cinders. Their mere presence can trigger volcanic eruptions, and they often […]

Bog Wyrm

HP: 317 AC: 16 DR: 3 Attack: 2d10+7, 2d6+7, 2d8+7
Ancient dragons whose scales are as black as the deepest swamp waters, their forms blend perfectly with the fetid marshes they call home. These sadistic predators prefer to watch their prey suffer, often offering false hope before delivering their acidic breath attacks that dissolve flesh and bone.