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Huge monstrosity (aquatic), chaotic neutral

Armor Class 18 (natural armor)
Hit Points 170 (20d12 + 40)
Speed 40 ft., swim 60 ft.

22 (+6)14 (+2)18 (+4)12 (+1)16 (+3)14 (+2)

Saving Throws Str +10, Dex +6, Con +8
Skills Perception +7
Damage Resistances bludgeoning, piercing, and slashing from nonmagical attacks
Senses darkvision 120 ft., passive Perception 17
Languages Aquan, understands Common but can’t speak
Challenge 10 (5,900 XP)

Amphibious. Abaia can breathe air and water.

Aquatic Camouflage. While underwater, Abaia has advantage on Dexterity (Stealth) checks made to hide.

Innate Spellcasting. Abaia’s innate spellcasting ability is Wisdom (spell save DC 15). It can innately cast the following spells, requiring no material components:

  • At will: Control Water, Detect Magic
  • 3/day each: Water Breathing, Water Walk

Legendary Resistance (3/Day). If Abaia fails a saving throw, it can choose to succeed instead.


Multiattack. Abaia makes two attacks: one with its bite and one with its tail.

  • Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 16 (2d8 + 7) piercing damage.
  • Tail Slap. Melee Weapon Attack: +10 to hit, reach 15 ft., one target. Hit: 14 (2d6 + 7) bludgeoning damage. If the target is a creature, it must succeed on a DC 18 Strength saving throw or be knocked prone.

Legendary Actions

Abaia can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Abaia regains spent legendary actions at the start of its turn.

  • Tail Swipe. Abaia makes a tail slap attack.
  • Vortex (Costs 2 Actions). Abaia creates a swirling vortex of water in a 20-foot radius centered on itself. Each creature within that area must make a DC 18 Strength saving throw, taking 21 (6d6) bludgeoning damage on a failed save, or half as much damage on a successful one. Creatures that fail the saving throw are pulled 10 feet toward Abaia and are restrained until the start of their next turn.

Description: Towering and serpentine, the Abaia is a creature of immense power. Its sleek form, adorned with iridescent scales, glistens with a vibrant play of blues and greens. With eyes that hold the wisdom of ages, it commands respect and exudes an air of mystery. In the depths of the waters, the Abaia possesses incredible speed and agility, capable of striking with its powerful bite and tail. Its innate connection to water allows it to manipulate its surroundings and unleash devastating watery forces. A being of chaos and neutrality, the Abaia protects its aquatic domain fiercely, ensuring the harmony of its realm.

This multi-eyed eel’s brightly colored markings shift in complex, ever-changing patterns.

Source Bestiary 4 pg. 7
Originally posted in Archives of Nethys

Originally from the primal world of the fey, an abaia protects lakes and their surroundings from exploitation, in particular by magic and overfishing. It favors waters with a mystical nature or supernatural properties. An abaia ignores creatures that take only what they need from the lake and otherwise show proper respect to the waters. Those that abuse an abaia’s lake risk capsized boats, floods, torrential rains, and even direct attacks. After sinking a vessel, an abaia searches the wreckage for magical treasure.

Abaia CR 10
XP 9,600

N Huge magical beast (aquatic)

Init +3; Senses arcane sightDarkvision 60 ft., Low-Light VisionPerception +19
AC 25, touch 11, flat-footed 22 (+3 Dexterity, +14 natural, –2 size)

hp 147 (14d10+70)

Fort +14, Ref +12, Will +8

SR 21 (in water only)
Speed 20 ft., Swim 80 ft.

Melee bite +21 (3d6+8/19-20 plus grab), tail slap +15 (2d6+4 plus grab)

Space 15 ft., Reach 15 ft.

Special Attacks constrict (2d6+12), endless coils

Spell-Like Abilities (CL 14th; concentration +17)

Constant – arcane sight, speak with animals
At will – control waterhydraulic torrentrainbow pattern (DC 17)

1/day – control weather
Strength 26, Dexterity 16, Constitution 21, Intelligence 17, Wisdom 14, Charisma 17

Base Atk +14; CMB +24 (+28 grapple); CMD 37 (can’t be tripped)

Feats Critical FocusImproved Critical (bite), Iron WillPower AttackStaggering CriticalVital StrikeWeapon Focus (bite)

Skills Knowledge (arcana) +17, Knowledge (nature) +17, Perception +19, Spellcraft +17, Stealth +12 (+24 in water), Swim +16; Racial Modifiers +12 Stealth in water

Languages Aquan, Sylvan; speak with animals

SQ eldritch gizzard, wave rider
Eldritch Gizzard (Su)

An abaia can activate arcane spell trigger items as if it were a 14th-level sorcerer. It can store items in a special compartment within its stomach and activate them as if it were holding them. It can swallow or regurgitate an item as a standard action.

Endless Coils (Ex)

As a full-round action, an abaia can attempt a single combat maneuver check to grapple up to two Large or four Medium or smaller creatures within its reach. Any targets successfully grabbed take constrict damage. The abaia only needs to succeed at one grapple check to maintain a grapple against multiple opponents.

Wave Rider (Su)

An abaia moving onto land brings a sheath of water with it, allowing it to Swim on land. Its Swim speed drops by 10 feet at the start of its turn if it is out of the water, and the sheath dissipates entirely when the abaia’s Swim speed reaches 20 feet. An abaia wave riding on land retains its Spell Resistance but loses its bonus to Stealth.
Environment warm lakes

Organization solitary

Treasure standard (particularly staves and wands)
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