Chasmfiend

huge monstrosity (titan), chaotic neutral

Challenge 10.0 (5,900 XP)

STR
25 (+7)
DEX
13 (+1)
CON
22 (+6)
INT
2 (-4)
WIS
10
CHA
5 (-3)

Defense

Armor Class 18 (natural)
Hit Points 190 (20d12 + 60 +3)
Speed 40 ft.

Proficiencies & Senses

Saving Throws strength, constitution
Skills
Senses
darkvision 60 ft.
tremorsense 60 ft.
passive Perception 15

Characteristics

Damage Vulnerabilities lightning
Damage Resistances bludgeoning, piercing, slashing
Damage Immunities poison
Condition Immunities charmed, frightened, paralyzed, poisoned
Languages understands Primordial but cannot speak

Traits

Acid Spray

The Chasmfiend can spray acid in a 30-foot cone, dealing 6d10 acid damage on a failed Dexterity saving throw (DC 16), or half as much on a success. This ability can be used once every 3 rounds.

Thunderous Roar

Once per day, the Chasmfiend can unleash a thunderous roar that causes all creatures within 60 feet to make a DC 16 Constitution saving throw or be deafened for 1 minute. A successful save halves the duration.

Actions

Multiattack

The Chasmfiend makes three attacks: one with its tail and two with its eyestalks.

Tail Slam

Melee Attack: +12 to hit, reach 10 ft., one target. Hit: 3d10 + 7 bludgeoning damage plus 2d10 acid damage and the target must succeed on a DC 16 Strength saving throw or be knocked prone.

Eyestalk Lash

Ranged Attack: +10 to hit, range 60 ft., one target. Hit: 2d10 + 7 acid damage and the target must make a DC 16 Dexterity saving throw or be blinded until the end of its next turn.

Reactions

Flung Into the Abyss

When struck by a melee attack while less than half hit points, the Chasmfiend can make an attack with its tail against the attacker as a reaction, pushing them 10 feet back and forcing them to make a Strength saving throw (DC 16) or be knocked prone.

Combat Behavior

Tactics


• Use acid spray to incapacitate foes before closing in.
• Employ a mix of ranged and melee attacks, alternating eyestalk lashes and tail slams.
• Utilize the terrain of the chasms to retreat or manipulate enemy positioning.

Combat Style

Aggressive and territorial, utilizing both brute force and area attacks.

Monster Description

The Chasmfiend is an awe-inspiring titan that dwells in the treacherous chasms and craggy plateaus where storms rage and the winds howl incessantly. With an imposing height of thirty feet, its colossal body resembles that of a crab, and it is covered in a luminous crystalline exoskeleton that refracts light in mesmerizing patterns. The brilliance of its shell seems to pulse with an inner energy, hinted at being remnants of the mysterious Stormlight that courses through the land, adding an otherworldly aspect to the otherwise terrifying creature. Notably, the Chasmfiend has long, flexible eyestalks that drip with corrosive acid, capable of lashing out at intruders with deadly accuracy. When angered, it emits a thunderous roar that resonates off canyon walls, instilling fear in those who hear it. The creature's tails, massive and muscular, can launch devastating attacks, capable of crushing bones and sending foes plummeting into the depths of the chasms.

The Chasmfiend has thrived for ages, adapting to its harsh environment by developing a formidable defense system with armored flanges that allow it to shrug off most weapons. The true danger lies in its ability to retaliate against those who recklessly strike at its armored joints; adventurers may find themselves flung into the abyss if they are not careful. Legends say that the Chasmfiend is not merely a mindless beast but a guardian of ancient secrets hidden deep within the chasms it roams, prompting many to seek it out for reasons beyond mere conquest. It is believed that those who survive an encounter with the Chasmfiend may come away with knowledge of its cryptic relationship with the storms and the energies that shape the very land they traverse.

Monster behavior

The behavior of the Chasmfiend is largely territorial; it fiercely defends its domain against any perceived threats. Adventurers or travelers who wander too close to its lair will quickly learn the dangerous nature of this titan. The carapace's shimmer often serves as a warning, as it can manipulate surrounding storms to create illusions and distractions to mislead intruders. Upon sensing movement nearby, the Chasmfiend relies on its powerful eyestalks to scout ahead. Its combat tactics involve using its acid spray at a distance to weaken foes before engaging in melee, leveraging the terrain to its advantage. The creature taps into its elemental powers during battle, channeling the storms above to accentuate its own moves. Should it sustain heavy damage, the Chasmfiend is known to retreat strategically, using the twisting paths of the chasm to lose its pursuers, returning to its lair for recovery before seeking revenge. It exhibits varying levels of aggression depending on the size and strength of its adversaries, preferring to intimidate smaller groups rather than engage head-on.

Ecology

The Chasmfiend plays a critical role in the ecosystem of the high plateaus, serving as both a guardian and predator. Its presence shapes the unique flora and fauna of its domain; the acidic sprays can nurture specific types of resilient plants that flourish in the chasm's depths, while also keeping the population of smaller creatures in check. This complex dynamic allows for a balance; the stalwart Chasmfiend sustains the harsh environment while also thriving on the various life forms that penetrate its territory. Creatures of lesser might often seek refuge in the crags and rocky outcroppings, contributing to a rich tapestry of life that surrounds the titan.

History

The history of the Chasmfiend is steeped in legend, with tales stretching back centuries about its emergence as a prominent figure of the stormy high plateaus. Some scholars theorize that it was born from the very storms it commands, perhaps as a guardian summoned to protect sacred sites hidden deep within the chasms. Over generations, the Chasmfiend has evolved, embodying the elemental chaos of the region, becoming both terror and protector. Many adventurers have sought it out, not simply to challenge its might but to uncover ancient secrets that are believed to be embedded in the darkest depths of the chasms. Each confrontation with the Chasmfiend strengthens the folklore surrounding it, with stories of those who ventured forth and returned changed forever. Whether these legends hold truth or are simply the fanciful imaginations of local storytellers, the Chasmfiend remains an enigmatic presence, ruling its jagged domain with unmatched authority.

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