Gargantuan Monstrosity (Dinosaur), Neutral
AC 25    Initiative +6 (16)
HP 1056 (54d12 + 408)
Speed 6 ft., It is quite an adept burrower, if angered.
Mod Save
STR 20 +5 +29
DEX 10 +0 +0
CON 20 +5 +30
Mod Save
INT 4 −3 −3
WIS 4 −3 −3
CHA 6 −2 −2
Skills Intimidation +35
Resistances Bludgeoning, Piercing, and Slashing from Nonmagical Attacks
Immunities Bludgeoning; Charmed, Frightened, Stunned
Senses Tremorsense It relies on vibrations.; Passive Perception 1
Languages None
CR 20 (XP 25,000; PB +6)
Traits

Thick Skin

When melee attacking, roll a d6, if the player gets a number smaller than 3, damage is lessened by 10.

Actions

 Body Slam

Roll for constitution, if you fail, you are dealt 100 damage.

Hammer Slam

Melee Weapon Attack: +8 to hit, reach 7ft., 6 target. Hit: 4 (52d12+640) [blugdeoning] damage.

Steam Shot

 Ranged Weapon Attack: +4 to hit, range 9/2ft., 4target. Hit: 1 (13d4+ 50) [Fire] damage.

Bonus Actions

Unstabilizing Stomp

Vaergun can only use a bonus action once every 5 turns.

The Vaergun stomps down leading to players having to make a dexterity check, if they fail, they fall down.

Reactions

Living Fortress

The Vaergun hunkers down for 2 turns. It is unable to attack, but is also resistant to melee attacks.

Legendary Actions

Vaergun can only do a legendary action once in the game.

Steam Crusher

The Vaergun bites a wall and crushes it, leading to a landslide, if the a character fails a dexterity, check they are knocked out unless another action is done.

Mythic Actions

Mythic Action Name. Enter the description for how mythic actions work for your monster here.

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.

Description

Within the mountains and other ore rich areas, the Vaergun roams. Land oysters grow rich in the region, absorbing nutrients from the silt. It is the Vaergun that eats these titanic oysters.

The Vaergun is about 20 meters long, it’s light green scales hard as a boulder. Osteoderms coat the top if its body. Its most striking feature adorns the top of its head, a grey horn that is remeniscent to a hammer. It has a tail thicker than the oldest cedars, and a jaw that can crush boulders. It walks on relatively short legs that end in hooves

The Vaergun surprisingly is not a relative of the Tarrasque, however it is a hadrosaurid.

This hadrosaur feeds on rocks and land oysters, it uses it’s hammer to crack open its food and then it feasts.

 

Lair and Lair Actions

A spacious cavern with the shells of land oysters littering the ground

Lair Actions

On initiative count 4 (losing initiative ties), the Vaergun takes a lair action to cause one of the following effects; the Vaergun can’t use the same effect two rounds in a row:

  • Steamy Shroud: steam coats the cavern, decreasing visibillity.

Regional Effects

The region containing a legendary Vaergun’s lair is moist and scentmarked which creates one or more of the following effects:

  • Animals refuse to enter the region.
  • Slipping in the are is easy.

If the Vaergun dies, these effects fade over the course of 1d6 days

Previous Versions

Name Date Modified Views Adds Version Actions
6/18/2025 5:02:59 AM
2
0
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Coming Soon

Habitat: MountainUnderdark

B_Gon

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