Gargantuan construct, unaligned
- Armor Class
- 18 (natural armor)
- Hit Points
- 247 (15d20 + 90)
- Speed
- 50 ft., burrow 30 ft.
- Challenge
- 16 (15,000 XP)
STR
28
+9
DEX
7
-2
CON
22
+6
INT
1
-5
WIS
8
-1
CHA
4
-3
- Saving Throws
- Con +11, Wis +4
- Damage Immunities
- poison; psychic; bludgeoning, piercing, slashing from nonmagical attacks that aren't adamantine
- Condition Immunities
- blinded; charmed; deafened; exhaustion; frightened; paralyzed; petrified; poisoned; prone
- Senses
- blindsight 30 ft., tremorsense 60 ft., passive Perception 9
Traits
Tunneler.
The worm can burrow through solid rock at half its burrow speed and leaves a 10-foot-diameter tunnel in its wake.
Regeneration.
The worm regains 10 hit points at the start of each of its turns if it has at least 1 hit point.
Actions
Multiattack.
The worm makes two attacks: one with its grinding jaws and one with its stinger.
Grinding Jaws.
Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 22 (3d8 + 9) slashing damage.
Tail Stinger.
Melee Weapon Attack: +14 to hit, reach 10 ft., one creature. Hit: 19 (3d6 + 9) piercing damage, and the target must make a DC 19 Constitution saving throw, taking 42 (12d6) poison damage on a failed save, or half as much damage on a successful one.