Dragon, Stoor

Family: Dragons

Gargantuan dragon, chaotic evil

Armor Class 21 (natural armor)
Hit Points 465 (30d20 + 60)
Speed 40 ft., swim 60 ft.

30 (+10) 14 (+2) 20 (+5) 16 (+3) 14 (+2) 18 (+4)

Skills Perception +12
Saving Throws Str +27, Con +22, Cha21
Damage Vulnerabilities fire
Damage Resistances poison
Condition Immunities frightened, poisoned
Senses blindsight 60 ft., darkvision 120 ft., passive Perception 22
Languages Common, Draconic
Proficiency Bonus +9
Challenge 30 (155,000 XP)


  • Amphibious. The stoor can breathe both air and water.
  • Innate Spellcasting. The stoor’s innate spellcasting ability is Charisma (spell save DC 19). The dragon can innately cast the following spells, requiring no material components:
  • Legendary Resistance (3/Day). If the stoor fails a saving throw, it can choose to succeed instead.
  • Siege Monster. The stoor deals double damage to objects and structures.


  • Multiattack. The stoor can use its Frightful Presence. It then makes two attacks: one with its bite and one with its tail, and it can use Tongue.
  • Bite. Melee Weapon Attack: +19 to hit, reach 20 ft., one target. Hit: 26 (3d10 + 10) piercing damage plus 10 (3d6) poison damage.
  • Tail. Melee Weapon Attack: +19 to hit, reach 20 ft., one target. Hit: 24 (4d6 + 10) bludgeoning damage.
  • Tongue. The stoor targets one Huge or smaller target that it can see within 30 feet of it. The target must make a DC 27 Strength saving throw. On a failed save, the target is pulled into an unoccupied space within 5 feet of the stoor.
  • Swallow. The stoor makes one tongue attack against a Huge or smaller creature it is grappling. If the attack hits, the target is swallowed, and the grapple ends. The swallowed creature is blinded and restrained, it has total cover against attacks and other effects outside the stoor, and it takes 28 (8d6) acid damage at the start of each of the stoor’s turns. The stoor can have only one creature swallowed at a time.
  • Putrid Breath (Recharge 5-6). The stoor exhales putrid breath in a 90-foot cone. Each creature in that area must make a DC 22 Constitution saving throw, taking 77 (22d6) poison damage on a failed save, or half as much damage on a successful one. A creature that fails the save by 5 or more is also poisoned until the end of its next turn.


The stoor 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. The stoor regains spent legendary actions at the start of its turn.

  • Detect. The stoor makes a Wisdom (Perception) check.
  • Tail Attack. The stoor makes a tail attack.
  • Putrid Breath (Costs 2 Actions). The stoor uses its Putrid Breath.


The stoor is a massive creature, reaching gargantuan proportions. Its serpentine body is covered in scales of dark green and black, with hints of iridescent hues shimmering across its skin. Long and sinuous, it moves through the water with ease, its body rippling and undulating with power. The stoor possesses a wide mouth filled with rows of sharp, venomous teeth, and its eyes gleam with a malevolent glow.

The stoor is primarily a denizen of the deep sea, dwelling in the darkest depths where the light struggles to penetrate. It is known to make its lair in underwater caves, hidden caverns, and treacherous underwater valleys. The creature is particularly drawn to areas with strong currents and abundant marine life.

The stoor is a solitary creature, rarely encountered by mortal beings. Its immense size makes it a dominant force within its marine environment. The dragon’s presence has a profound impact on the ecosystem, as its putrid breath contaminates plants and its predation disrupts the balance of marine life. The stoor’s durability allow it to withstand the harsh conditions of the deep sea.

The stoor is a formidable predator, capable of taking down creatures of considerable size. It uses its powerful jaws and venomous bite to immobilize and weaken its prey before swallowing them whole. The dragon’s tongue acts like a pitchfork, allowing it to impale its victims. The stoor is also known for its ability to lay in wait, ambushing unsuspecting creatures that venture too close to its lair. Its putrid breath is used as both a weapon and a means of incapacitating prey.

The stoor dragon’s one weakness is fire. Few can actually harm it, but more than one adventurer has found themselves swallowed by the monster and through desperate trial-and-error learned that they can burn it from the inside, inevitably causing the stoor dragon to disgorge the contents of its stomach into the ocean.

Section 15: Copyright Notice

5E RPG: Celtic Bestiary. Copyright 2023, Mal and Tal Enterprises, LLC; Author Michael Tresca.

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