An ankheg is a burrowing creature who hunts by luring its prey into a trap it has set. The ankheg burrows in loose soil and creates a pit that traps the hunted. It then bores up from its hiding place to attack. It will attempt to grab its prey and drag it back into the tunnel as the loose soil closes up above.

The ankheg grows to approximately 10 feet’ long and weighs around 800 lbs.

—Creaturi Obscuria


  • Challenge Rating: 3
  • Size: Large
  • Type: Magical Beast
  • Initiative: +0


  • Hit Points: 25 (3 HD: 3d10+9)
  • Armor Class: 16, touch 9, flat-footed 16 (-1 size, +7 natural)
  • Saves: Fort +6 Ref +3 Will +2


  • Speed: 30 ft., burrow 20 ft.
  • Base Attack: +3
  • Melee: Bite +5 (2d6+4 plus 1d4 Acid and Grab)
  • Special Attacks: Spit Acid, Grab


  • Abilities: STR +3, DEX +0, CON +3, INT -5, WIS +1, CHA -2
  • Skills: Acrobatics +0, Athletics +3, Awareness +6, Endurance +3, Knowledge -, Persuasion -2, Spellcraft -, Survival +1, Thievery +0
  • Talents: Investigator
  • Special Qualities: Darkvision 60 ft., Low-light Vision, Tremorsense 60 ft.


  • Environment: Warm Plain or Desert
  • Organization: Solitary, cluster (2-4)
  • Treasure: None or Incidental 

Spit Acid

Once every 6 hours, an ankheg can spit a 30-foot line of acid. Creatures struck by this acid take 4d4 points of acid damage (Reflex DC 14 halves damage). Once an ankheg uses this attack, it must wait 6 hours before using it again. Additionally, during this time period, its bite attack does not inflict any additional acid damage. As a result, an ankheg does not use this ability unless it is desperate or frustrated, most often spitting acid when reduced to fewer than half its full normal hit points or when it cannot not successfully grab an opponent. 

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