Sathaq Worm — fantasy monster illustration. Sathaq Worm is a huge elemental (Challenge Rating 10).

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Sathaq Worm

Huge Elemental, Neutral Evil

AC
16
HP
149
Speed
40
CR
10

False


Armor Class 16 (natural armor)

Hit Points 149 (13d12 + 65)

Speed 40 ft., burrow 20 ft.


STR
22 (+6)
DEX
6 (-2)
CON
20 (+5)
INT
5 (-3)
WIS
12 (+1)
CHA
9 (-1)

Skills Stealth +2, Perception +5

Damage Vulnerabilities False

Damage Resistances bludgeoning, piercing, and slashing from nonmagical attacks

Damage Immunities acid, poison

Condition Immunities exhaustion, paralyzed, petrified, poisoned

Senses tremorsense 60 ft., passive Perception 15

Languages understands Deep Speech and Terran but can’t speak

Challenge 10


Traits

Agonizing Aura. The sathaq worm emits ultrasonic noise and minor vibrations that cause pain and subtly disrupt the functions of most creatures. A creature that starts its turn within 15 feet of the sathaq worm must succeed on a DC 17 Constitution saving throw or have disadvantage on attack rolls until the start of its next turn. Creatures with resistance or immunity to thunder damage automatically succeed on the saving throw.

Earth Glide. The sathaq worm can burrow through nonmagical, unworked earth and stone. While doing so, the worm doesn't disturb the material it moves through.

Earthen Camouflage. The sathaq worm has advantage on Dexterity (Stealth) checks made to hide in sandy, muddy, or rocky terrain.

Siege Monster. The sathaq worm deals double damage to objects and structures.

Actions

Multiattack. The sathaq worm makes one Bite attack and two Slam attacks, or it makes three Slam attacks. It can replace its Bite attack with a use of Swallow.

Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 24 (4d8 + 6) piercing damage, and the target is grappled (escape DC 17). Until this grapple ends, the target is restrained, and the sathaq worm can't Bite another target.

Slam. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 19 (3d8 + 6) bludgeoning damage.

Swallow. The sathaq worm makes one Bite attack against a Large or smaller creature it is grappling. If the attack hits, the target is also swallowed, and the grapple ends. While swallowed, the target is blinded and restrained, it has total cover against attacks and other effects outside the worm (including the worm's Agonizing Aura), and takes 10 (3d6) piercing damage and 10 (3d6) acid damage at the start of each of the sathaq worm's turns. The sathaq worm can have only one creature swallowed at a time.

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Sathaq Worm — fantasy monster illustrationPrimary
FTTHelper · auto-generated · monster · monster

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Further reading

Jetpack7 Game Master Series
The Game Master's Book of Random Encounters
Jeff Ashworth · 2020
The Game Master's Book of Traps, Puzzles and Dungeons
Jeff Ashworth · 2022
The Game Master's Book of Legendary Dragons
Aaron Hübrich · 2022