Iffdahsil

Tremorsense allows a monster to feel the vibrations through a solid surface caused by movement. It is an imprecise sense with a limited range (listed in the ability). Tremorsense functions only if the monster is on the same surface as the subject, and only if the subject is moving along (or burrowing through) the surface.

Lifesense allows a monster to sense the vital essence of living and undead creatures within the listed range. The sense can distinguish between the vitality energy animating living creatures and the void energy animating undead creatures, much as sight distinguishes colors.

This monster can see in all directions simultaneously and therefore can't be flanked.

A monster with this ability regains the given number of Hit Points each round at the beginning of its turn.

60 feet. DC 45 fortitude A creature entering or starting its turn in the aura that fails at a Fortitude save becomes Doomed 1 and Drained 1. If the target was already doomed or drained, the values of these conditions increase by 1, to a maximum of doomed 3 and drained 3. A creature that dies while doomed 3 and drained 3 in this way disintegrates into black sand.

Unlike most undead, Iffdahsil isn't destroyed at 0 HP. Iffdahsil's fast healing continues to function normally, though on any round it begins its turn at 0 HP, it is Enfeebled 4 and Slowed 1 until the start of its next turn. While Iffdahsil is at 0 HP, it can be killed permanently only by simultaneously exposing it to direct sunlight (or a 10th-rank Sunburst spell) and casting a Miracle or Wish spell (or similar magic) directed at destroying it.

A creature with void healing draws health from void energy rather than vitality energy. It is damaged by vitality damage and is not healed by vitality healing effects. It does not take void damage, and it is healed by void effects that heal undead.

(3d10+17) piercing, DC 41 fortitude Note: A DC was not provided for this ability by Paizo. The DC present here is a moderate DC for the creature level according to the Gamemastery Guide creature building Tables. 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.

A creature that begins its turn inside Iffdahsil takes 10d6 void damage. Iffdahsil gains temporary HP for 1 minute equal to half the damage dealt.

DC 43 reflex, 10d6 void damage, Escape, Rupture 45 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.

Iffdahsil deals 8d8 piercing damage to each creature in a 10-foot emanation (DC 43 reflex save) and can also attempt to Grab any creatures who critically fail their save as a free action. Iffdahsil is then Off-Guard until the start of its next turn.

Requirements The monster's last action was a successful Strike that lists Grab in its damage entry, or the monster has a creature Grabbed or Restrained Effect If used after a Strike, the monster attempts to Grapple the creature using the body part it attacked with. This attempt neither applies nor counts toward the creature's multiple attack penalty. 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.