Giant Mythic Neothelid

Giant Mythic Neothelid CR 19/MR 7

XP 204,800
CE Colossal aberration (mythic, mythos)
Init +8MF (+15 underground), dual initiative; Senses blindsight 100 ft., trace teleport 60 ft.; Perception +25 (+32 undergound)


AC 39, touch -1, flat-footed 39 (+4 armor, –3 Dex, +36 natural, –8 size)
hp 326 (20d8+236)
Fort +17, Ref +3, Will +16
Defensive Abilities energy conversion, DR 10/cold iron and epic, plus slashing or piercing; SR 33


Speed 30 ft., fly 60 ft. (good)
Melee 4 tongues +19 (3d8+12/19–20 plus 1d6 acid and grab)
Space 30 ft.; Reach 30 ft.
Special Attacks breath weapon (50-ft. cone, 14d10 acid, Reflex DC 29 for half, usable every 1d4 rounds), caustic tongues, fast swallow, mind thrust, mind-melting effluent, mythic power (7/day, surge +1d10), psychic crush, swallow whole (2d8+12 plus 2d6 acid damage, AC 28, 32 hp)
Spell-Like Abilities (CL 20th; concentration +27)


Str 34, Dex 5, Con 28, Int 18, Wis 15, Cha 25
Base Atk +15; CMB +35 (+39 grapple); CMD 42 (can’t be tripped)
Feats Cleave, Critical Focus, Great Cleave, Great Fortitude, Improved Criticalmf (tongue), Improved Initiative, Iron Will, Power Attack, Quicken Spell-Like Ability (suggestion), Sickening Critical
Skills Bluff +25, Climb +16, Diplomacy +25, Fly +10, Intimidate +28, Knowledge (arcana) +25, Knowledge (dungeoneering, engineering) +20 (+27 underground), Perception +25 (+32 underground), Spellcraft +26, Use Magic Device +18
Languages Aklo, Terran, Undercommon; telepathy 100 ft.
SQ cystic sage, psicaster, seugathi spawner


Caustic Tongues (Ex)

A mythic neothelid’s tongues drip acid that deals an additional 1d6 points of damage on a successful hit. On a critical hit, this damage is increased to 3d6. If a mythic neothelid hits a creature with acid resistance or immunity with its tongues, it can expend one use of its mythic power to suppress that creature’s resistance or immunity to acid for 1 minute.

Cystic Sage (Ex)

A mythic neothelid is a savant of knowledge about the deep places below the ground. Knowledge (dungeoneering) and Knowledge (engineering) are class skills for a mythic neothelid, and it gains a bonus equal to its mythic rank on initiative checks and on Knowledge (dungeoneering), Knowledge (engineering), Perception, and Survival checks made underground. In addition, the caster level and save DC of any divination effect it uses underground is increased by 2.

Energy Conversion (Su)

When a mythic neothelid takes damage from an effect that deals acid, cold, electricity, fire, or sonic damage, it can expend one use of its mythic power as an immediate action to gain immunity to that form of energy for a number of minutes equal to its mythic rank or until it absorbs up to 200 points of damage of that type, whichever comes first.

A mythic neothelid can discharge up to 50 points of this stored energy as a swift action, or up to 100 points as a standard action, as a ray of energy with a range of 120 feet. It can also discharge 10 points of stored energy per round as a free action, which causes its natural weapons to deal 1d6 points of energy damage of the discharged type (2d6 points of damage of that type on a critical hit). A mythic neothelid can use this ability to absorb and redirect multiple forms of energy simultaneously, spending one use of its mythic power for each type of energy.

Mind Thrust (Su)

As a standard action up to three times a day, a neothelid can deliver a massive blast of mental energy at any one target within 60 feet, inflicting 15d10 points of damage.

A successful DC 27 Will save negates the effect. This effect can only harm creatures with Intelligence scores. This is a mind-affecting effect. The save DC is Charisma-based.

Mind-Melting Effluent (Ex)

A mythic neothelid’s acidic saliva gives off psychotropic vapors, causing any creature that fails its saving throw against its breath weapon to contract mindfire (DC 27 Fort negates). A creature beginning its turn grappled by a neothelid must likewise save or contract mindfire, with a -4 penalty on the saving throw if swallowed whole. If a mythic neothelid expends one use of its mythic power, these vapors intensify for 1 minute. During this time, its mind-melting effluent has an instantaneous onset time on a failed save and can affect living creatures that are normally immune to disease.

Psicaster (Ex)

Mythic neothelids are great students of arcane mysteries. They treat Use Magic Device as a class skill and can suppress the acidic secretions of one or more of their tongues in order to hold an item with that tongue. If the item creates a mind-affecting effect, the mythic neothelid gains a competence bonus equal to its mythic rank on the Use Magic Device check to activate it and uses its own Charisma score to set the save DC.

Psychic Crush (Su)

As a standard action up to three times a day, a neothelid can attempt to crush the mind of a single creature within 60 feet. The target must make a DC 27 Will save or collapse, becoming unconscious and dying at –1 hit points. If the target succeeds on the save, it takes 6d6 points of damage and is sickened for 1 round. This is a mind-affecting effect. The save DC is Charisma-based.

Seugathi Spawner (Ex or Sp)

A mythic neothelid shares the spelllike abilities and damage reduction of the seugathi they spawn.

They are immune to the supernatural and spell-like abilities of seugathi, as well as to seugathi poison. As a full-round action, a mythic neothelid can expend one use of its mythic power to gestate and birth a seugathi. If the mythic neothelid expends two uses of its mythic power, it may spawn a mythic seugathi or may add the agile, invincible, or savage mythic simple template to an ordinary seugathi.

Trace Teleport (Ex)

A neothelid telepathically and reflexively learns the mental coordinates of the destination, of all creatures that teleport within 60 feet of it, gaining an awareness of the location equivalent to “seen casually.” This knowledge fades and is lost after 1 minute. This power does not grant any environmental information about the conditions of the destination.


Environment any underground
Organization solitary, pair, or cult (1 mythic neothelid plus 1–4 neothelids, 1–4 seugathi, and 4–12 charmed slaves of various races)
Treasure standard

Its slime-drenched length coiled upon itself in a shuddering mountain, this huge worm’s tentacled head rises like a snake’s.

Section 15: Copyright Notice

Mythos Monsters (PF1) © 2022, Legendary Games; Authors Jason Nelson, Jim Groves, Jonathan Keith, Tom Phillips, Alistair J. Rigg, and Greg A. Vaughan

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