Skeleton Wyrm

large aberration (none), neutral evil

Challenge 5.0 (1,800 XP)

STR
16 (+3)
DEX
11
CON
16 (+3)
INT
2 (-4)
WIS
12 (+1)
CHA
1 (-5)

Defense

Armor Class 14 (Natural)
Hit Points 85 (10d10+30 +3)
Speed 20 ft., burrow 10 ft.

Proficiencies & Senses

Saving Throws
Skills
Senses
darkvision 60 ft.
blindsight 10 ft.
tremorsense 30 ft.
passive Perception 13

Characteristics

Damage Vulnerabilities fire
Damage Resistances
Damage Immunities poison
Condition Immunities blinded, deafened, frightened
Languages understands Common but cannot speak

Traits

Burrowing

The Skeleton Wyrm can burrow through earth and stone as easily as through air. Its burrowing leaves no tunnel, but it creates a tremor that can be sensed.

Skeletal Presence

Creatures that start their turn within 10 feet of the Skeleton Wyrm must succeed on a DC 13 Wisdom saving throw or be frightened until the end of their next turn.

Actions

Bite

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 2d10 + 5 piercing damage and the target must make a DC 15 Constitution saving throw, taking 3d6 poison damage on a failed save, or half as much damage on a successful one.

Burrowing Charge

The Skeleton Wyrm moves through solid earth to charge at a target, making it move up to double its speed. Any creature it moves through must succeed on a DC 15 Strength saving throw or take 3d8 bludgeoning damage and be knocked prone.

Combat Behavior

Tactics


• Ambush prey by burrowing and creating tremors.
• Uses its bite primarily to inflict damage and poison.
• Uses fear tactics to disorient creatures nearby before unearthing itself.

Combat Style

Aggressive ambusher, striking from the shadows or ground.

Monster Description

The Skeleton Wyrm is a massive, grotesque aberration, stretching up to 40 feet in length. Its elongated body is a twisted black with green glowing streaks that pulse ominously. The creature is known for its eerie skeletal mask, seemingly grinning, which adds a horrifying semblance to its already terrifying visage. The skull mask, devoid of flesh, serves as a reminder of the many victims it has consumed. Legends say that these worms are the corrupted remnants of ancient primordial beings that have stumbled too deep into the earth’s layers, integrating the essence of death and destruction into their forms. Their presence disturbs the natural order of lower realms, often causing other creatures to vanish mysteriously in a twisted fate. They hunt with a frightening quiet, often pulling unsuspecting prey into the earth before they have a chance to react. The glow of their bodies is the only indication of their presence, and a cautious adventurer can suffer greatly if they stray too close to the burrowed trails left behind in the ground. This creature is often mistaken for a buried lost artifact or an urban legend, until it strikes with ferocity and cunning, proving its dominance in the shadows of its territory.

Its presence affects the local ecosystem, as it preys on weaker creatures and sometimes decimating entire populations. Many adventurers have lost their lives attempting to hunt this beast, drawn by tales of its supposed hoard of treasures or magical artifacts located deep within its burrows.

Skeleton Wyrms are solitary by nature, but in rare cases, two may work together if food sources are particularly scarce. This rarely leads to an audience with exhilaration, as their joint terror usually devastates the surroundings further, and the tales of their horrific deeds only grow more elaborate with each survivor's account. They are feared and respected by those enthusiastic enough to explore the forgotten depths below the earth.

Monster behavior

The Skeleton Wyrm employs a combination of stealth and aggression in its hunting strategy. When it senses prey nearby, it often begins to burrow, creating tremors to disorient potential victims above ground before it explodes from the ground in a burst of motion to surprise its target. The creature prefers ambushing them, relying on its frightening abilities to instill panic in its victims before using its brute strength to drag them underground. The aura of fear it emits serves to weaken the resolve of any adventurer who dares approach, and to those who have encountered it, it is a tale of fear that perpetuates its infamy among underground dwellers. Most often, it will retreat when seriously wounded, but possesses an innate cunning that allows it to escape from troublesome foes in a breathtakingly strategic manner, favoring the underground as its final getaway. If cornered, its ferocity becomes a horrifying testament to its survival instincts, striking back with a vengeance and summoning its unholy terror to crush any who oppose it.

Ecology

The Skeleton Wyrm plays a unique role within its ecosystem, acting as both predator and scavenger. By consuming not only living meat but also decaying organic matter, it aids in breaking down the remnants of dead creatures and returning nutrients back into the soil, albeit in a much darker manner. This process sometimes has detrimental effects on surface-level flora, causing corruption in plants near its burrows. The lingering darkness alters these creatures, often resulting in strange, twisted mutations.

One of the most striking impacts of the Skeleton Wyrm on fauna is how it disrupts regular food chains. Local fauna becomes wary, and prey often begin to migrate away from areas known for Wyrm activity, ultimately leading to an imbalance within their ecosystem. The absence of smaller creatures becomes apparent, as it may lead to larger predators gravitating toward the depths or vacuuming out other species altogether. While they might seem like forces of nature, they are destructive and unsettling presences that create ripples of chaos in their wake.

History

Many ancient texts reference the Skeleton Wyrm as an entity tied to the primal forces of nature, some ancient civilization even depicting them prominently in their ruins and art. Scholars debate that perhaps these entities were once guardians of the earth's underbelly, maintaining balance in an age long forgotten. Over time, their purpose twisted into that of death and destruction, leading them to become solitary and vindictive hunters that now inflict dread upon any intruders in their territory.

Encounters with a Skeleton Wyrm historically have been met with horror and fascination. Stories tell of civilizations once conducting rites to appease these beasts, offering sacrifices, likely in attempts to keep their wrath at bay. Things grew stale over the centuries, and the horrific temptations surrounding these creatures have sparked legends that grow more insidious with each passing tale. The advent of magic schools, which delve into the arcane and the unnatural, has often been drawn to rumors surrounding this wyrm, leading to increased exploration and subsequent demise to uncover its dark aspects. Latter scholars deem its just as a myth, perhaps becoming lost in the earth, yet those who delve into the underbelly still quake as echoes of the Skeleton Wyrm’s burrows sing out, reminding those who wander of its relentless, ravenous hunger.

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