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Sea Serpent, Fanged

Family: Sea Serpents

Large dragon, neutral evil

Armor Class 15 (natural armor)
Hit Points 93 (11d10 + 33)
Speed 0 ft., swim 40 ft.

18 (+4) 13 (+1) 16 (+3) 5 (-3) 11 (+0) 6 (-2)

Skills Athletics +7, Perception +3
Damage Immunities poison
Condition Immunities poisoned, prone
Senses darkvision 60 ft., passive Perception 13
Languages Aquan, Draconic
Challenge 5 (1,800 XP)

Special Traits

  • Amphibious. The fanged serpent can breathe air and water.


  • Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) piercing damage plus 7 (2d6) poison damage, and the target is grappled (escape DC 15). Until this grapple ends, the target is restrained and the sea serpent cannot grapple another target. While the fanged serpent has a creature grappled in its bite, it cannot bite a different creature, and has advantage on bite attacks against the grappled creature.
  • Roll. One target that the fanged serpent has grappled takes 21 (6d6) slashing damage as the fanged serpent rolls quickly. After this damage is dealt, the target is no longer grappled.


This serpent is 12 to 15 feet long and 5 feet thick. Its body scales are thickened and hardened, which slows it somewhat in water but provides good protection. The serpent’s most outstanding features, however, are the rows of long, sharp teeth that fill its mouth. It has large, lidless red eyes with white pupils.

The fanged sea serpent is a vicious predator of the seas feared for its tendency to travel in packs and swarm over creatures much larger than itself. Fanged sea serpents are nomadic, traveling with ocean currents.

They prefer to hunt in groups, which they can surround and attack from all sides. Fanged sea serpents have been known to attack their own kind, but only when starving.

Fanged sea serpents on their own usually live on large fish and avoid confronting intelligent opposition unless they believe their victims to be helpless. However, when they are in groups, they become much more aggressive, and attack creatures much larger than themselves.

They prefer to use swarm tactics, surrounding their target and attacking simultaneously from all directions; in the water, where they can also attack from above and below, few marine creatures can stand up to a prolonged assault.

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