Carnivorous Blob

Motion Sense — A carnivorous blob can sense nearby creatures through vibration and air or water movement.

Retaliating Strike —

Split — When a carniverous blob that has 10 or more HP is hit by an attack that would deal piercing or slashing damage, it splits into two identical oozes, each with half the original's HP. One ooze is in the same space as the original, and the other is in an adjacent, unoccupied space. If no adjacent space is unoccupied, it automatically pushes creatures and objects out of the way to fill a space (the GM decides if an object or creature is too big or heavy to push).

Carnivorous Blob Acid — A carnivorous blob's acid damages only flesh-not bone, stone, wood, or other materials- but is nonetheless devastating. Whenever a creature takes damage from this acid, it must succeed at a DC 33 Fortitude save or become Drained 1 (Drained 2 on a critical failure). On each subsequent failure, the drained condition value increases by 1 (or by 2 on a critical failure), to a maximum of drained 4.

Constrict — 2d12 bludgeoning plus 2d6 acid{2d12 bludgeoning plus 2d6 acid}, DC 33 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.

Engulf — DC 33 Reflex, 4d10 acid damage, Escape, Rupture 20

The monster Strides up to double its Speed and can move through the spaces of any creatures in its path. Any creature of the monster's size or smaller whose space the monster moves through can attempt a Reflex save with the listed DC to avoid being engulfed. A creature unable to act automatically critically fails this save. If a creature succeeds at its save, it can choose to be either pushed aside (out of the monster's path) or pushed in front of the monster to the end of the monster's movement. The monster can attempt to Engulf the same creature only once in a single use of Engulf. The monster can contain as many creatures as can fit in its space.

A creature that fails its save is pulled into the monster's body. It is Grabbed, is Slowed 1, and has to hold its breath or start suffocating. The creature takes the listed amount of damage when first engulfed and at the end of each of its turns while it's engulfed. An engulfed creature can get free by Escaping against the listed escape DC. An engulfed creature can attack the monster engulfing it, but only with unarmed attacks or with weapons of light Bulk or less. The engulfing creature is Off-Guard against the attack. If the monster takes piercing or slashing damage equaling or exceeding the listed Rupture value from a single attack or spell, the engulfed creature cuts itself free.
Effect: Engulf and Swallow Whole

A creature that gets free by either method can immediately breathe and exits the swallowing monster's space.

If the monster dies, all creatures it has engulfed are automatically released as the monster's form loses cohesion.

Grab —