Indos Worm

Large beast, unaligned

Armor Class 14 (natural armor)
Hit Points 33 (6d10)
Speed 20 ft., burrow 10 ft., swim 10 ft.

13 (+1) 15 (+2) 10 (+0) 1 (-5) 10 (+0) 2 (-4)

Condition Immunities blind, prone
Skills Perception +2, Stealth +4
Senses blindsight 30 ft., tremorsense 30 ft., passive Perception 13
Challenge 2 (450 XP)

Special Traits

  • Ambusher. In the first round of a combat, the indos worm has advantage on attack rolls against any creature it surprised.
  • Amphibious. The indos worm can breathe air and water.
  • Flammable Blood. If the indos worm drops to half its hit points or fewer, it gains vulnerability to fire damage.
  • Swamp Camouflage. The worm has advantage on Dexterity (Stealth) checks made to hide in swampy terrain.


  • Multiattack. The worm makes two attacks: one with its grinding jaws and one to constrict.
  • Grinding Jaws. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 5 (1d8 + 1) slashing damage.
  • Constrict. Melee Weapon Attack: +3 to hit, reach 10 ft., one creature. Hit: 11 (3d6 + 1) bludgeoning damage. If the target is Medium or smaller, it is grappled (escape DC 11) and pulled 5 ft. toward the indos worm. Until this grapple ends, the target is restrained, the worm tries to drown it, and the worm can’t constrict another target.


This massive worm is so large that a ten-year old boy could hardly encircle it with his arms. A single tooth is attached to the upper jaw, another to the lower, and both are square and about eighteen inches long.

Indos worms have teeth strong enough that they can crush with the greatest ease anything that they get between them, be it stone, be it animal, tame or wild. Each one is covered with a hide two fingers thick. During the daytime they live at the bottom of the river, wallowing in mud and slime; for that reason they are not to be seen.

Night Feeders. Indos worms are nocturnal, only crawling onto land at nightfall, attacking all they encounter. They crush and then drag down their prey into a body of water and eat it there, devouring every member of the victim excepting its paunch. They sometimes get hungry during the day and will ambush animals drinking from the water by dragging them down.

Weapons of War. Indos worms do have some value as weapons of war-a thick oil can be extracted from their bodies. Ten vials of alchemist’s fire can be extracted per worm.

Section 15: Copyright Notice

5E RPG: Ancient Adventures. Copyright 2020, Mal and Tal, LLC; Author Michael Tresca.

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