Gargantuan monstrosity, unaligned

Armor Class 19 (natural armor)
Hit Points 346 (22d20+110)
Speed 0 ft., swim 50 ft.

26 (+8) 10 (+0) 18 (+5) 2 (-4) 10 (+0) 7 (-2)

Saving Throws Dex +6, Con +11
Skills Perception +6, Stealth +6 (+12 if submerged)
Damage Resistances bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities cold
Senses darkvision 120 ft., passive Perception 16
Challenge 18 (20,000 XP)


  • Black See. The lasiodon sees perfectly in darkness, including magical darkness. Each of its six heads protrudes a fleshy appendage that can project natural luminescence or shadow. Once each round as a bonus action, Land-eater determines how many heads to light up to illuminate an area, increasing the illumination in a 10-foot sphere per head. If none of its heads project light, it can instead project magical darkness (as the spell). Each head then reduces the illumination level to total darkness in a 60-foot sphere.
  • Camouflage. The lasiodon can spread itself out over a large area with its long necks and immense torso. It changes color to match the waters it swims in and moves with aquatic grace. While submerged, it has advantage on Dexterity (Stealth) checks.
  • Keen Smell. The lasiodon has advantage on Wisdom (Perception) checks that rely on smell.
  • Multiple Heads. The lasiodon has six heads. While it has more than one head, the lasiodon has advantage on saving throws against being blinded, charmed, deafened, frightened, stunned, and knocked unconscious. Whenever the lasiodon takes 55 or more damage in a single turn, one of its heads dies.
  • Reactive Heads. For each head, Land-eater has beyond one, it gets an extra reaction that can be used only for opportunity attacks.
  • Water Breathing. Land-eater can breathe only underwater.


  • Multiattack. The lasiodon makes as many bite attacks as it has heads. At full health, a lasiodon has six.
  • Bite. Melee Weapon Attack: +14 to hit, reach 25 ft., one target. Hit: 24 (3d10 + 8) piercing damage. If the target is a Large or smaller creature, it must succeed on a DC 19 Dexterity saving throw or be swallowed by the lasiodon. A swallowed creature is blinded and restrained, it has total cover against attacks and other effects outside the lasiodon, and it takes 21 (6d6) acid damage at the start of each of the lasiodon’s turns. If the lasiodon takes 33 damage or more on a single turn from a creature inside it, the lasiodon must succeed on a DC 22 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of the lasiodon. If the lasiodon dies, a swallowed creature is no longer restrained by it and can escape from the corpse by using 20 feet of movement, exiting prone.
  • Frigid Breath (Recharge 5-6). The lasiodon exhales an icy blast in a 90-foot cone. Each creature in that area must make a DC 19 Constitution saving throw, taking 67 (15d8) cold damage on a failed save, or half as much damage on a successful one. Creatures that fail the saving throw are also encased in ice and gain the restrained condition until the ice melts or is destroyed. The ice has Armor Class 15 and 33 Hit Points, and damage from all effects other than magical fire and adamantine weapons is reduced by 5 points per attack. If the ice is created under water the target floats upward 60 feet each round at the beginning of its turn.


  • Frozen Food. When the lasiodon is reduced to less than half its original hit points its frigid breath attack option recharges and it may use it as a reaction.


A lasiodon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. A lasiodon regains spent legendary actions at the start of its turn.

  • Move. The lasiodon moves up to half its speed.
  • Shroud. The lasiodon radiates magical darkness (as the spell) in a 30-foot radius. The darkness lasts until the start of the lasiodon’s next turn.
  • Bite. (Costs 2 Actions). The lasiodon makes one bite attack.


Lasiodons are something out of ancient nightmares, with whale-like bodies, powerful fluked tails, and thick fins surmounted by six long-necked heads. Above each head’s nightmarish maw is a curved, fleshy growth that glows in the dark waters with a pale radiance.

Deep Hydras. Lasiodons hunt the deepest oceans, luring inquisitive prey with the white glow of their protruding anglers and devouring it whole. With teeth able to slice solid stone, a lasiodon can freeze its quarry, sometimes attacking a school of large fish by freezing some and devouring others. In the darkest coldest depths, blocks of ice created by the creature’s breath weapon remain still for several seconds before ascending slowly. Adult lasiodons average 60 feet long and weigh over 50 tons.

Unlimited Growth. Lasiodons never stop growing and seem immune to the effects of aging. Adult females average 60 feet long and weigh over 50 tons.

Lone Hunter. Lasiodons are cunning but not intelligent or social. The ferocious predators require a large hunting area, so they are almost always alone when encountered. They mate every few years at particularly bountiful hunting grounds in a frenzy that turns the ocean’s green waters red.

Section 15: Copyright Notice

Legendary Planet Adventure Path (5E) © 2020, Legendary Games; Authors: Matt Goodall, Jim Groves, Steven T. Helt, Tim Hitchcock, Jason Nelson, Richard Pett, Tom Phillips, Mike Shel, Neil Spicer, Mike D. Welham

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