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Iffdahsil

Creature 21 (unique) — aberration, undead, unholy

Pre-Remaster content. May include legacy alignment.

The slithering horror known as Iffdahsil is an undead shoggoth that has haunted the vault of the Black Desert for millennia. Drow legends in particular tend to feature Iffdahsil, terrifying the elves from a young age.

Source: extinction-curse-bestiary (Pre-Remaster)

Perception +38
Skills athletics +40, intimidation +36
Str
+11
Dex
+9
Con
+10
Int
+0
Wis
+8
Cha
+7
AC 43 Fort +39 Ref +36 Will +35
HP 380
Immunities bleed, blinded, controlled, critical-hits, deafened, death-effects, disease, paralyzed, poison, precision, sleep, unconscious
Resistances acid 20, cold 20, sonic 20
Weaknesses holy 20
Speed 40 feet, burrow 40 feet, climb 25 feet

Offense

Melee Pseudopod +38, Damage 5d10+21 piercing

Abilities

Tremorsense (Imprecise) 60 feet — Tremorsense
Lifesense (Imprecise) 60 feet — Lifesense
All-Around Vision — All Around Vision
+1 Status Bonus to Saves vs. Magical Effects
Fast Healing 30 — Fast Healing
Aura of Annihilation (aura, occult) — 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.
Unkillable (occult) — 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.
Void Healing — Negative Healing
Constrict — 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. Constrict
Eat Away — 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.
Engulf — DC 43 Reflex, 10d6 void damage, , Rupture 45 Engulf
Tentacular Burst — 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.
Grab — Grab

Spells

Overwhelming Presence (rank 9)
Disappearance (At Will) (Self Only) (rank 8)
Hallucination (rank 5)
Hallucinatory Terrain (rank 4)

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