Giant Octopus
CREATURE 8Giant octopuses are found in the heart of deep, dark oceans. Clever and adaptable, they hunt and devour all manner of animals. Despite growing up to 16 feet long, a giant octopus can compress its body to squeeze through small gaps as long as there's room for its beak.
Giant octopuses favor shipwrecks, coral reefs, or underwater caverns as lairs, where they can take advantage of narrow confines for protection. Like their smaller kin, they're fond of adorning and decorating their lairs with found objects—many of which, in the giant octopus's case, are also magical weapons, shields, or works of art salvaged from sunken ships or fallen adventurers.
A giant octopus can move through a gap at least 2 feet wide without Squeezing, and can Squeeze through a gap at least 1 foot wide.
1d8+9 bludgeoning, DC 26 basic Fortitude
The monster deals the listed amount of damage to any number of creatures Grabbed or Restrained by it. Each of those creatures can attempt a basic Fortitude save with the listed DC.
The octopus emits a cloud of black ink in a 30-foot emanation. This cloud has no effect outside of water. Creatures inside the cloud are Undetected and can't use their sense of smell. The cloud dissipates after 1 minute.
The octopus can't use Ink Cloud again for 2d6 rounds.
The octopus moves up to 200 feet in a straight line through the water without triggering reactions.
The giant octopus makes up to four Strikes with different arms, each against a different target. Each attack counts separately for the octopus's multiple attack penalty, but the penalty doesn't increase the until the octopus has made all the attacks.
If the octopus subsequently uses the Grab action, it can Grab any number of creatures it hit with Writhing Arms.
The monster can instead use Grab and choose one creature it's grabbing or restraining with an appendage that has Grab to automatically extend that condition to the end of the monster's next turn.