Large monstrosity, unaligned

Armor Class 15 (natural armor)
Hit Points 60 (8d10 + 16)
Speed 20 ft., climb 20 ft., swim 30 ft.

17 (+3) 15 (+2) 14 (+2) 2 (-4) 12 (+1) 2 (-4)

Skills Stealth +6
Senses darkvision 60 ft., passive Perception 11
Challenge 3 (700 XP)

Special Traits

  • Split. The amphisbaena functions normally even if cut in half. If dealt a critical hit with a slashing weapon, the creature is cut in half and continues to function as two separate creatures, each with half of the original amphisbaena’s current hit points. The split amphisbaena can rejoin its two halves after completing a short or long rest. If one of the split creatures is slain, the amphisbaena can regrow the lost portion over the course of 1d4 + 2 weeks.


  • Multiattack. The amphisbaena makes one bite attack with each of its two heads.
  • Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 12 (2d8 + 3) piercing damage, and the target must succeed on a DC 13 Constitution saving throw or become poisoned for 1 hour.


This creature appears as a huge snake with a head at each end of its body. Its scales are blackish-blue with bands of lighter blue fading into its coloration near the middle of its body. Its heads are glossy-black and its eyes are crimson.

The amphisbaena is a giant poisonous snake about 10 feet long. It is often found lairing near a water source or in dark, damp locations. An amphisbaena moves on land by grasping one of its necks with its other head and rolling across the ground like a hoop.

An amphisbaena is an aggressive and territorial creature, attacking any living creatures that wander near its lair. It attacks by biting with its poisonous fangs from both of its heads.

Section 15: Copyright Notice

Tome of Horrors © 2018, Frog God Games, LLC; Authors: Kevin Baase, Erica Balsley, John “Pexx” Barnhouse, Christopher Bishop, Casey Christofferson, Jim Collura, Andrea Costantini, Jayson ‘Rocky' Gardner, Zach Glazar, Meghan Greene, Scott Greene, Lance Hawvermale, Travis Hawvermale, Ian S. Johnston, Bill Kenower, Patrick Lawinger, Rhiannon Louve, Ian McGarty, Edwin Nagy, James Patterson, Nathan Paul, Patrick N. Pilgrim, Clark Peterson, Anthony Pryor, Greg Ragland, Robert Schwalb, G. Scott Swift, Greg A. Vaughan, and Bill Webb

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