Huge monstrosity, neutral

Armor Class 16 (natural armor)
Hit Points 94 (9d12 + 36)
Speed 10 ft., swim 50 ft.

20 (+5) 14 (+2) 19 (+4) 10 (+0) 14 (+2) 10 (+0)

Skills Perception +10, Stealth +6, Survival +6
Damage Immunities fire
Senses darkvision 60 ft., passive Perception 20
Languages Aquan, Common
Challenge 9 (5,000 XP)

Special Traits

  • Heat. A creature who touches a scylla takes 7 (2d6) fire damage.
  • Multiple Heads. The scylla has six heads. It has advantage on saving throws against being blinded, charmed, deafened, frightened, stunned, or knocked unconscious.
  • Water Breathing. The scylla can only breathe underwater.
  • Water Dependency. A scylla can survive on land for 6 hours before suffocating.


  • Multiattack. The scylla makes three bite attacks.
  • Bites. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 23 (4d8 + 5) piercing damage.
  • Superheat Water (Recharge 5-6). The scylla uses one of the following options.
  • Scalding Blast. The scylla releases a line of scalding water that is 60 feet long and 5 feet wide. Creatures in the area must make a DC 16 Dexterity saving throw, taking 35 (10d6) fire damage on a failed saving throw, or half as much damage on a successful saving throw.
  • Boil Water. The water surrounding a scylla in a radius of 10 feet rises to a boil. All creatures within the area must make a DC 16 Constitution saving throw, taking 24 (7d6) fire damage on a failed saving throw, or half as much damage on a successful one. The area remains at a boil for 1 minute, even if the scylla moves to another space.


This massive sea monster is about 20 feet long with a rounded lower body, four large fins, a short tail, and six heads, each perched on top of a long snake-like neck.

Scyllas are thought to be related to hydras, though no proof exists connecting the two. They are found in climates from temperate to warm (they don’t like the cold) and prefer to lair in natural underwater caves and caverns, only emerging when hungry. A scylla is a predatory creature, existing on a diet of large fish such as shark, octopus or squid, or unlikely swimmers and sailors.

Prey is usually devoured in the same spot it is killed; rarely does a scylla return to its lair with prey except when nursing its young.

Scyllas are solitary creatures, and even during mating season, it is rare to actually encounter more than one of these creatures. The mating ritual lasts but a short time with the male swimming away afterward, never to return to the lair. Young are born about 6 months later and reach maturity in just under a year.

Young scyllas are noncombatants and do not possess the heat ability of adult scyllas.

A scylla is gray-blue to dark gray in color with a lighter shaded underbelly. Its fins are gray-blue to dark gray. Its eyes are golden or gray and each mouth is lined with triple rows of whitish-gray teeth.

Scyllas can grow to a length of 50 feet.

Scyllas attack their foes with vicious bites from their multiple heads.

When facing more than one opponent, a scylla uses its heat ability to boil the water surrounding it and burn its foes. Scyllas prefer to attack when it is most advantageous, such as surfacing under a foe. If combat goes against a scylla it dives beneath the waves and swims away. A cornered or hungry scylla, or one defending its lair, always fights to the death.

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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