Medium Swarm of Small beasts, Unaligned
AC 14 Natural Armor    Initiative +4 (14)
HP 5 (1d6 + 5)
Speed 10 ft., Swim 60 ft.
Mod Save
STR 16 +3 +3
DEX 18 +4 +14
CON 14 +2 +2
Mod Save
INT 6 −2 −2
WIS 14 +2 +10
CHA 8 −1 −1
Skills Perception +4
Senses Passive Perception 4
Languages only languages it knew in life.
CR 10 (XP 5,900; PB +4)
Traits

Amphibious

Can breathe both air and water.

Bioluminescent Veil
As a bonus action, the Octopus can dim or brighten its glow:

  • Dim: Advantage on Stealth checks in water
  • Bright: Enemies within 10 ft. have disadvantage on Perception checks

Tidal Bond (Beast Master Feature)
Adds your proficiency bonus to:

  • Attack rolls
  • Damage rolls
  • Saving throws
  • Skills

Flavor Bond Ability

Fisherman’s Instinct
While within 30 ft. of you:

  • You gain advantage on Survival checks related to water, fishing, or tracking aquatic creatures
  • Once per long rest, it can guide you to a rich fishing area or hidden underwater path
Actions

Multiattack (Level 5+)

The Octopus makes two attacks: one Bite and one Constrict.

Bite
Melee Weapon Attack:

  • (your proficiency bonus + 4) to hit
    Reach: 5 ft., one target

Hit: 1d8 + 4 piercing damage
→ Target must succeed on a DC 13 Constitution save or take 3d6 lightning damage as charged seawater surges through them.

Constrict

Melee Weapon Attack:

  • (your proficiency bonus + 4) to hit

Hit: 1d6 + 3 bludgeoning damage
→ Target is grappled (escape DC 14)
→ While grappled, target takes 2d6 bludgeoning damage at the start of each turn.

Tidal Surge (Recharge 5–6)
The Octopus releases a burst of pressurized water in a 15-ft cone.

  • DC 13 Strength save
  • Fail: 2d8 bludgeoning + knocked prone
  • Success: Half damage, not knocked prone

If used underwater → range increases to 30 ft.

Bonus Actions

Slipstream Strike
When this companion is within 10ft radios/reach of an enemy, the Octopus can add +3 AC against that attack, potentially causing it to miss.

this only has to uses in combat until it is fully recovered by long rest or resummoning. 

Reactions

Slipstream Dodge
When hit by an attack, the Octopus can add +3 AC against that attack, potentially causing it to miss.

Legendary Actions

Enter the description for how legendary actions work for your monster here.

Legendary Action Name (Costs # Actions). Enter the description for your legendary action.

Mythic Actions

Mythic Action Name. Enter the description for how mythic actions work for your monster here.

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.

Description

Abyssal Tide Octopus

A sleek, bioluminescent sea predator that glides through water like a ghost ship beneath the waves. Its body resembles a large reef predator, with glowing markings that pulse when it prepares to strike.

Lair and Lair Actions

Enter a description of your monster's lair here.

Lair Actions

On initiative count # (losing initiative ties), the [monster name] takes a lair action to cause one of the following effects; the [monster name] can’t use the same effect two rounds in a row:

  • Enter a description for a lair action.
  • Enter a description for a lair action.

Regional Effects

The region containing a legendary [monster name]’s lair is [enter the effect description], which creates one or more of the following effects:

  • Enter a regional effect description.
  • Enter a regional effect description.

If the [monster name] dies, these effects fade over the course of #d# days.

Previous Versions

Name Date Modified Views Adds Version Actions
3/24/2026 1:45:18 AM
2
0
1
Coming Soon

Monster Tags: beast companion

Habitat: CoastalUnderwater

Boren_Picklepom

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