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Ridgeborn Unbound - AI-generated fantasy Monster

Ridgeborn Unbound

Ridgeborn Unbound is the name used by the researchers for this creature's original kind. This one was injected with so much dragon-derived material that its former mind was overwhelmed. The experimenters recorded the transformation as a success until the subject began to scream through the night and smash its restraints. It now wanders the Underdark, reacting to pain and unfamiliar movement as if every approach were another procedure.

Monsters
Large aberration · CR 13 , Hard for a level 14 party · Unique

Ridgeborn Unbound

A Ridgeborn Unbound subjected to catastrophic dragon-DNA experiments, transformed into a suffering, gorilla-like draconian brute whose mind has been overwhelmed by its altered body.
AC17
HP210/210
CR13 , Hard for a level 14 party
Init
STR
DEX
CON
INT
WIS
CHA
ConditionsNone

Combat

AC 17 · HP 210 · CR 13 , Hard for a level 14 party

Ridgeborn Unbound

Large aberration (dragon-mutated humanoid), unaligned
Armor Class17 (natural armor)
Hit Points210 (20d10 + 100)
Speed
40 ft.,
Climb 30 ft.
STR
DEX
CON
INT
WIS
CHA
Saving ThrowsStrengthConstitutionWisdom
SkillsAthleticsPerceptionSurvival
Weaknesses
Its impaired mind makes it susceptible to misdirection and simple environmental tricks.
It is not immune or resistant to its own breath damage type.
Senses
Darkvision 120 ft.,
Passive Perception 17
Languages
Understands Common and Draconic but cannot speak
Challenge13 , Hard for a level 14 party
Proficiency Bonus+5
Initiative+3
Save DC18
Brute Frame. The Ridgeborn has advantage on Strength checks and Strength saving throws. It counts as one size larger when determining its carrying capacity and the weight it can push, drag, or lift.
Dragon-Touched. Choose acid, cold, fire, lightning, or poison when the Ridgeborn is created. Its Bite deals additional damage of that type, and Ruinous Exhalation deals that type of damage.
Fractured Mind. The Ridgeborn has advantage on saving throws against being frightened. It has disadvantage on Intelligence checks made to recall information or solve a complex problem.

Actions

Multiattack. The Ridgeborn makes three attacks: one with its Bite and two with its Claws.
Bite. Melee Weapon Attack: to hit, reach 10 ft., one target. Hit: 21 () piercing damage plus 5 () damage of the type chosen for its Dragon-Touched trait.
Raking Claw. Melee Weapon Attack: to hit, reach 10 ft., one target. Hit: 17 () slashing damage. If the target is Large or smaller, it must succeed on a Strength saving throw or be knocked prone.
Ruinous Exhalation (Recharge 5-6). The Ridgeborn exhales a warped surge of draconic energy in a 30-foot cone. Each creature in the area must make a Dexterity saving throw, taking 56 () damage of the type chosen for its Dragon-Touched trait on a failed save, or half as much on a success. The breath's damage type is acid, cold, fire, lightning, or poison, chosen when the Ridgeborn is created. The Ridgeborn can't use this action again until it recharges at the start of one of its turns on a roll of 5 or 6.
Rending Charge. The Ridgeborn moves up to its speed in a straight line. During this movement, it can move through the spaces of Large or smaller creatures. Each creature whose space it enters must make a Dexterity saving throw. On a failed save, a creature takes 18 () bludgeoning damage and is knocked prone. On a successful save, it takes half as much damage and isn't knocked prone. The Ridgeborn can make one Claw attack against a creature it knocks prone during this movement.

Reactions

Pain-Fueled Retaliation. When a creature the Ridgeborn can see hits it with a melee attack, the Ridgeborn lashes out with a Claw attack against that creature if it is within 10 feet.

Legendary Actions

Lumbering Surge. The Ridgeborn moves up to half its speed without provoking opportunity attacks.
Savage Swipe. The Ridgeborn makes one Claw attack.
Terrible Heave (costs 2 actions). One creature the Ridgeborn can see within 10 feet must succeed on a Strength saving throw or be pushed up to 15 feet away and knocked prone. On a successful save, it is pushed 5 feet and remains standing.
Role
Brute
Built for
14

Gear

  • Broken restraints (Experimental equipment, No monetary value)Broken manacles and fragments of an experimental harness remain embedded in scar tissue. They have no combat function.

Augmentations

Experimental draconic grafts: scales, horns, tail, and an unstable breath organ, all created through invasive procedures.
Reinforced forelimb tendons grant crushing strength but cause tremors and pain after exertion.

Notes for the game master

Custom creature built for D&D 5E, calibrated as a CR 13 solo brute for a level 14 party.
Choose one damage type for Dragon-Touched when creating the encounter: acid, cold, fire, lightning, or poison. Use that type consistently for its bite and breath.
Legendary actions are custom features intended to help the creature function as a solo encounter.

Tactics

  1. Opening

    The Ridgeborn hears intruders before it sees them. It lumbers into view, huffs in distress, then charges the loudest or closest threat. If several enemies cluster together, it opens with Ruinous Exhalation.

  2. Mid-fight

    Use Rending Charge to disrupt a formation and knock a target prone, then focus its attacks on that target. It uses its breath when it can catch multiple enemies without striking a creature that is cowering or incapacitated.

  3. End of the fight

    When badly wounded, it focuses on the nearest threatening creature and tries to crush or bite it, interspersing attacks with its breath if available. It does not pursue fleeing creatures far from its den.

  4. Retreat

    It does not fight to the death out of courage or malice. At 45 hit points or fewer, if it has a clear route, it tries to retreat to a secluded pocket of its lair. It may stop to defend an injured creature or a familiar object.

How it fights

Use its long reach and movement to pressure ranged characters, but let its impulsive behavior create opportunities for clever positioning.
The breath is powerful but limited by its recharge, so telegraph it with a choking inhale and a glow or shimmer along its throat.
It prefers to attack immediate threats rather than coordinate or pursue a chosen target with tactical discipline.

Who it attacks first

The nearest creature that blocks its escape or threatens it with pain.
A creature dealing repeated damage to it.
Several clustered creatures, if Ruinous Exhalation can strike them.

Works well with

A cramped cavern can make its charge and breath especially dangerous, but provide pillars or side passages for characters to use as cover.
A researcher, handler, or familiar item can create a roleplaying opportunity to distract it or temporarily calm it.

How to beat it

Spread out to reduce the number of creatures caught in Ruinous Exhalation.
Use Dexterity saves, cover, and resistance to its chosen breath damage type.
Avoid allowing it to charge through a tightly grouped line; difficult terrain and obstacles can limit its straight-line movement.
Calm emotions, healing, or compassionate roleplay may create openings, though none automatically ends its aggression.

Ways to avoid a fight

A character who approaches slowly, avoids threatening gestures, and succeeds on a DC 18 Wisdom (Animal Handling) or Charisma (Persuasion) check can calm it briefly. It remains wary, and sudden movement can end the calm.
A successful DC 16 Wisdom (Medicine) check identifies its distress as a consequence of invasive procedures and unstable grafts.
Characters can recover research notes or a personal keepsake from its den, potentially learning how to help or identify the creature.

Ecology

A huge, low-slung amalgamation with the hunched shoulders and long forelimbs of a gorilla, but almost nothing else that looks wholly humanoid. Ridged scales overlap in mismatched patches, horns jut crookedly from its skull, and a heavy tail drags furrows through the stone. Surgical scars pucker beneath the scales. Its mouth hangs open around uneven teeth as it wheezes, whimpers, and occasionally bellows with a dragon's force.

Behavior

It walks on all fours, using its forelimbs to haul its bulk over broken stone. Pain and confusion make its reactions abrupt: it may roar at a reflection, cower from a familiar smell, or attack anything that blocks its escape. Its violence is defensive and disorganized rather than cruel. Between bouts of aggression, it presses its head against the wall and makes low, almost human sounds.

How it lives

It needs far more food than a normal humanoid of its size and scavenges cave fauna, fungus, and anything left by explorers. Its altered metabolism runs hot; after using its breath, it often pants and trembles. It has no stable breeding population and is the product of deliberate experimentation.

Lair

A disused laboratory hollowed into a cavern, now strewn with broken restraints, crushed tables, and torn canvas screens. The Ridgeborn sleeps in a deep alcove behind a natural stone ridge, surrounded by objects it has carried from the ruins without understanding why they matter.

Habitat
Underdark

Signs that it is near

Deep hand-shaped gouges in stone, too high and wide to be made by an ordinary humanoid.
The metallic smell of old surgical tools mixed with hot, reptilian musk.
Scattered bones and crushed equipment, with no neatly eaten remains.
Low, rhythmic moaning that occasionally breaks into a roar.

Tags

Aberration,
Brute,
Dragon-mutated,
Tragic,
Solo

Lore

Ridgeborn Unbound is the name used by the researchers for this creature's original kind. This one was injected with so much dragon-derived material that its former mind was overwhelmed. The experimenters recorded the transformation as a success until the subject began to scream through the night and smash its restraints. It now wanders the Underdark, reacting to pain and unfamiliar movement as if every approach were another procedure.

What drives it

Find shelter from pain and noise. It may also seek familiar sights or smells from its former life, though it cannot reliably recognize them.

After the fight

The creature's body slowly cools, while the unnatural draconic tissue continues to twitch for several minutes. Its broken restraints and discarded research equipment may reveal who changed it and whether others suffered the same fate. If treated gently before death, its last sounds may resemble a name or a plea.

“This one was injected with so much dragon-derived material that its former mind was overwhelmed.”
From its lore

Variants

The researchers used a different dragon source, changing the breath damage type and the color or texture of its scales.
A partially stabilized Ridgeborn retains brief moments of recognition and can communicate with broken phrases, but has reduced hit points and a weaker breath.

Hooks

Plot hooks

A surviving researcher claims the Ridgeborn can be restored, but their notes may be incomplete or self-serving.
The party finds a trail of crushed equipment leading toward a settlement whose residents have mistaken the creature for a dragon.
A former companion recognizes an old token in the Ridgeborn's den and asks the party to recover it without killing the creature.

How to use it

Use it as a tragic, highly visible consequence of unethical experimentation rather than as a mindless random monster.
A hard encounter for four level 14 characters if fought alone in a spacious chamber. Add hazards or lesser creatures only if the party is well-rested.
Give the party opportunities to notice its distress and choose whether to fight, flee, or attempt to calm it.
Its lair can contain restraints, discarded instruments, and evidence of its former identity.

Treasure

A few intact experimental instruments and vials, valuable to the right buyer but dangerous to handle.
Research notes documenting the transformation and the Ridgeborn's former identity.
A personal keepsake from its earlier life, worth little in coin but potentially important to someone who knew it.

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