Gweogong 괴오공

Huge monstrosity, chaotic neutral

Armor Class 17 (natural armor)

Hit Points 207 (18d12 + 90)

Speed 50 ft., climb 40 ft., burrow 20 ft.

STR 23 (+6) · DEX 16 (+3) · CON 21 (+5) · INT 10 (+0) · WIS 14 (+2) · CHA 7 (−2)

Saving Throws Dex +8, Con +10, Wis +7

Skills Perception +7, Stealth +8, Survival +7

Damage Resistances poison; bludgeoning, piercing, and slashing from non-magical attacks that aren’t adamantine

Condition Immunities poisoned, prone

Senses darkvision 60 ft., tremorsense 60 ft., passive Perception 17

Languages understands Common but can’t speak

Challenge 11 (7,200 XP)

Traits

Centuries of Malice. Gweogong adds its proficiency bonus to damage rolls made with its Bite (included).

Fanged Paralysis. A creature that takes poison damage from Gweogong’s Bite must succeed on a DC 18 Constitution saving throw or be paralyzed for 1 minute. The creature can repeat the save at the end of each of its turns, ending the condition on itself on a success.

Segmented Body. Gweogong can move through a space as narrow as 3 feet wide without squeezing. Opportunity attacks against it are made with disadvantage.

Smoke Sensitivity. If Gweogong begins its turn in an area of heavy smoke or similar particulate matter (such as the stinking cloud spell or an area lightly obscured by at least two overlapping smoke sources), it is weakened until the end of its turn: it has disadvantage on attack rolls and ability checks, and its speed is halved.

Innate Spellcasting (Rituals Only). When Gweogong has lived one thousand years it gains minor mystical insight. It can cast disguise self and alter self (self only) at will, requiring no material components.

Actions

Multiattack. Gweogong makes three attacks: one with its Bite and two with its Slashing Legs.

Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 20 (2d8 + 6) piercing damage plus 18 (4d8) poison damage and Fanged Paralysis.

Slashing Leg. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 14 (2d6 + 6) slashing damage.

Constricting Coil (Recharge 5–6). Gweogong lunges and loops its body around creatures in a 15-foot line that is 5 feet wide. Each creature in that line must make a DC 18 Strength saving throw. On a failure, a creature takes 27 (6d8) bludgeoning damage and is grappled (escape DC 18). Until this grapple ends, the creature is restrained and takes 13 (3d8) bludgeoning damage at the start of each of its turns. Gweogong can constrict up to two Medium or smaller creatures at a time.

Bonus Actions

Rapid Skitter. Gweogong moves up to its speed. This movement does not provoke opportunity attacks from any creature it has hit with a melee attack this turn.

Reactions

Venomous Riposte. When a creature within 10 feet misses Gweogong with a melee attack, Gweogong can make a Bite attack against that creature.

Lore

A colossal centipede that can easily kill an adventurer; most often found at high elevations or dwelling in a

The name Gweogong is made up of two parts: “gweo” (괴), meaning “monster,” and “ogong” (오공), meaning “centipede.” Literally, “Gweogong” translates to “monster centipede.”

Unlike its real-world cousins, Gweogong is colossal. Paleontology even records a prehistoric creature called Arthropleura that resembled it: a giant arthropod that lived about 300 million years ago and grew up to nine feet long (2.6 m). Although Arthropleura was probably herbivorous, the mere fact that centipedes of such scale once existed lends credibility to the folklore.

From Korean Bestiary 5E, p. 50 · Fern Flower Press