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Bablop, Swamp Sovereign - AI-generated fantasy Monster

Bablop, Swamp Sovereign

Locals tell of a 'swamp god' that rose from the lake and razed a city. The muckwyrm's image is carved into battered totems and depicted in painted murals as a purple-and-green wyrm. Folktales insist it demands tribute of fish and the firstborn calf; some claim it can speak and bargains with men to spare whole clans.

Monsters
Huge dragon · High · Unique (one known specimen)

Bablop, Swamp Sovereign

A wingless, swamp-dwelling dragon that rules a lake-and-mire ecosystem through venom, cunning, and a cult of frog-like worshipers; it prefers to drown and poison rather than burn.
AC18
HP195/195
CRHigh
Init
STR
DEX
CON
INT
WIS
CHA
ConditionsNone

Combat

AC 18 · HP 195 · High

Bablop, Swamp Sovereign

Huge dragon (dragon), neutral evil
Armor Class18 (natural armor)
Hit Points195 (17d12 + 85)
Speed
30 ft.,
Swim 40 ft.,
Burrow 10 ft. (muck)
STR
DEX
CON
INT
WIS
CHA
Saving ThrowsDexConWis
SkillsPerceptionStealthSurvival
Damage Resistances
acid 50% damage,
cold 50% damage
Immunities
disease
Weaknesses
Out of water or deep muck its mobility and lair advantages are sharply reduced,
Fire deals normal damage and can ignite nearby peat, creating hazards for it and its worshipers
Senses
darkvision 60 ft.,
tremorsense 10 ft.,
passive Perception 15
Languages
Draconic,
Common
ChallengeHigh
Passive Perception15
Amphibious Resilience. The muckwyrm can breathe air and water. It can also end the paralyzed effect from its bite on itself once per short rest by thrashing and expelling the last of the toxin.
Keen Smell. The muckwyrm has advantage on Wisdom (Perception) checks that rely on smell and on checks to hide in marsh, swamp, or murky water.
Sovereign Presence. If the muckwyrm is within its lair, the area is suffused by its influence. See Lair Actions and Lair Effects.
Cult of the Muckwyrm. A creature that drinks or eats something the muckwyrm has fed to its worshipers must succeed on a Wisdom saving throw or gain a strong devotion toward the muckwyrm for 24 hours.
Cautious Mind. If subjected to a magic effect that would charm or command it, the muckwyrm has advantage on the saving throw.

Actions

Multiattack. The muckwyrm makes two attacks: one with its bite and one with its tail.
Venomous Bite. Melee Weapon Attack: to hit, reach 10 ft., one target. Hit: 15 () piercing damage plus 24 () poison damage. The target must succeed on a Constitution saving throw or become poisoned for 1 minute. While poisoned this way, the target is paralyzed for 1 round at the start of each of its turns and takes 7 () poison damage at the end of each of its turns. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. A creature that succeeds on the initial saving throw takes half the poison damage and is not poisoned.
Tail Strike. Melee Weapon Attack: to hit, reach 15 ft., one target. Hit: 14 () bludgeoning damage. If the target is grappled by the muckwyrm, the target takes an additional 9 () bludgeoning damage and is pushed up to 10 feet into muck or water; if pushed into shallow water or muck, it must succeed on a Strength saving throw or be knocked prone.
Mudmist Cone. The muckwyrm exhales a choking cloud of brackish mist in a 20-foot cone. Each creature in that area must make a Constitution saving throw. On a failed save a creature takes 21 () poison damage and is blinded until the end of its next turn. On a successful save a creature takes half damage and is not blinded. The muckwyrm can use this action once, and it regains the use if it finishes a short or long rest.
Drowning Grapple. The muckwyrm attempts to grapple and drag a Large or smaller target into the water or deep muck. Melee Weapon Attack: to hit, reach 10 ft., one target. Hit: the target is grappled (escape ). Until the grapple ends the target is restrained and takes 9 () bludgeoning damage at the end of each of the muckwyrm's turns as it grinds the target into mud.

Reactions

Snap Reaction. When a creature the muckwyrm can see moves into water or muck within 20 feet, the muckwyrm can make a tail strike against that creature.

Legendary Actions

Tail Lash. The muckwyrm makes a tail strike against one target within reach.
Slide. The muckwyrm shifts up to half its movement without provoking opportunity attacks.
Command Cultists (costs 2 actions). The muckwyrm issues a chilling croak and signals its bullywug followers within 120 feet. Up to 3 bullywugs or 1 bullywug warrior it can see immediately use their reaction to move up to their speed and make one weapon attack. If no bullywugs are present, the muckwyrm instead forces one creature it can see to make a Wisdom saving throw or be frightened until the end of its next turn.
Role
Controller / Ambusher
Built for
Party level 12

Gear

  • Ancient Hoard (Treasure, approximately 3,000 gp total)A modest hoard including 2,400 gp in assorted coins, a large amethyst (200 gp), a tarnished bronze ceremonial spear carved with unknown script (functions as a +1 spear to the right wielder after cleansing), and several bowls and statuettes worth 150 gp together.

Notes for the game master

Proficiency bonus +4 assumed for CR 12
Venom effects stack with other poison sources but follow standard conditions rules

Tactics

  1. Opening

    Lie in wait in water or a deceptively shallow pool. If possible, lure prey into a kill zone with decoys, sacrificed fish, or the bullywug cult's cries. Strike with a surprise bite, then use Drowning Grapple to pull a victim into the muck.

  2. Mid-fight

    Use Mudmist Cone to blind and weaken clustered foes, then use Multiattack to inject venom into the most dangerous targets. When enemies attempt to flee, use tail pushes and lair features to block exits and pull them back.

  3. End of the fight

    Finish off wounded enemies with tail strikes and drag them into water to drown. Use legendary actions to reposition or call minions if the fight is turning against it.

  4. Retreat

    If reduced below half its hit points, the muckwyrm becomes increasingly cautious: it withdraws into deep water, uses lair effects and minions to harry foes, and will retreat to a hidden underwater cavern if badly wounded, leaving traps and a handful of bullywug defenders to slow pursuers.

How it fights

Begin fights from water or hidden pools and use Mudmist Cone to disorient grouped foes.
Keep high-value threats grappled and dragged into water to finish them with drowning damage and repeated venom injections.
Use minions and terrain to break up enemy formations and isolate single targets for rapid multiattack venom application.

Who it attacks first

Large animals and mounted fighters first to rapidly secure food
Spellcasters and healers next, to prevent counters to its venom
Solitary stragglers to lure and poison until party cohesion breaks

Works well with

Bullywug swarms and ranged bullywug shamans who harass foes while the muckwyrm finishes them
Environmental hazards like sinking platforms and choking reed beds

How to beat it

Remove the muckwyrm from water or dry it out to reduce its mobility and lair advantages.
Antitoxin spells and Cure Disease help victims of its venom; spells that grant advantage on Con saves are very effective.
Detect and disable its traps and bullywug scouts before the party is lured into the kill zone.

Ways to avoid a fight

Negotiate with bullywug priests who may be willing to broker a truce or deliver tribute in exchange for a promise to leave the clan alone.
Bribe or distract the worshipers to lure the muckwyrm out of its lair.
Use ritual cleansing or perform ceremonies at the ruined temple to weaken the muckwyrm's influence over the bullywugs.

Ecology

A hulking, wingless dragon covered in mottled green and purple scales streaked with mud and algae. Its eyes are glossy and sickly yellow, and long, barbed spines run along its neck and down its thick tail. Its maw drips dark venom and strands of marshweed hang from its jaws and forelimbs.

Behavior

Patient and calculating. The muckwyrm prefers ambushes and traps over head-on attacks. It manipulates local bullywugs and muckdwellers through displays of power and carefully orchestrated 'miracles' to maintain worship. It is territorial and will escalate from harassment to full predation when its hunting grounds are threatened.

How it lives

Centuries ago the muckwyrm destroyed a lakeside civilization and absorbed fragments of its culture. Over time the ruins sank beneath peat and water, and the muckwyrm's presence altered the ecosystem so that fish and amphibians now dominate. Bullywugs and other marsh creatures worship or fear it, bringing it food and occasional sacrifices in exchange for protection from predators.

Lair

A flooded limestone cavern reached through reed-choked channels and a sinking stone causeway. The lair contains partially submerged ruins of a temple and several shallow pools connected by choking muck. The muckwyrm's lair has entrenched traps, hidden pits, and bullywug shrines that act as focal points for its control over the local creatures.

Habitat
Lakeside caves, peat bogs, marshes, and flooded ruins

Signs that it is near

Half-eaten carcasses dragged to the waterline
Frog-like choruses and crude totems near the lake
Streaks of purple-green slime on reeds and rocks

Tags

swamp,
ambusher,
venom,
lair,
leader

Lore

Locals tell of a 'swamp god' that rose from the lake and razed a city. The muckwyrm's image is carved into battered totems and depicted in painted murals as a purple-and-green wyrm. Folktales insist it demands tribute of fish and the firstborn calf; some claim it can speak and bargains with men to spare whole clans.

What drives it

Maintain control of its territory and food supply, feed its worshipers enough to keep them loyal, and hoard relics and trophies from the civilization it destroyed as tokens of dominance.

After the fight

The swamp slowly reclaims what remains of the wyrm's lair. Local bullywug worshipers steal small items from the hoard and leave offerings, while scholars or greedy treasure hunters sift through ruined statues and pottery for clues to the fallen civilization. Any magic items recovered are often corroded by centuries of brackish moisture unless properly treated.

“The muckwyrm's image is carved into battered totems and depicted in painted murals as a purple-and-green wyrm.”
From its lore

Variants

Younger Muckwyrm (CR 8): Lower HP (110), bite poison damage reduced to 4d6, legendary actions disabled.
Elder Muckwyrm (CR 16): Higher HP (260), venom DC 19 and 10d6 poison damage, lair features intensified, additional legendary action that causes a geyser of muck.

Hooks

Plot hooks

Villagers come to the party after a herd of cattle is pulled into the marsh; rumors say a dragon now controls the lake.
A scholar offers a reward for relics from the sunken temple—find the muckwyrm's hoard and the truth of the old civilization.
A bullywug priest begs the party to eliminate a rival within his tribe who wants to overthrow the muckwyrm and banish their 'god'.

How to use it

Ambush in shallow pools or reed-choked channels.
Trap-and-lure using partially submerged ruins and fake carcasses.
Ranged harassment from bullywug skirmishers while the muckwyrm finishes the kill.

Treasure

Approximately 3,000 gp equivalent in coins and gems
One minor magic weapon: Tarnished Spear of the Sunken Temple (functions as +1 spear after a Remove Curse and short ritual of cleansing)
Several ritual bowls and statuettes valued at 150 gp total

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