Sandy petersens cthulhu mythos (1) 301

Abyssal Custodian
What You See
This armored insectoid-crustacean has
thick, spiked, shiny chitin and resembles
a machine as it hunches over. Its thick
tail subdivides into claw-like cerci.


CR 18

XP 153,600
CE Gargantuan aberration
Init +8; Senses darkvision 60 ft., true seeing; Perception +31
DEFENSE

AC 33, touch 10, flat-footed 29 (+4 Dex, +23 natural, –4 size)
HP 290 (20d8+200)
Fort +16, Ref +12, Will +20
Defensive Abilities dimensional acclimation;
DR 15/adamantine and bludgeoning; Immune cold,
poison, fear; Resist electricity 30
OFFENSE

Speed 40 ft., climb 40 ft., fly 50 ft. (clumsy)
Melee bite +29 (2d8+18), 2 slams +29 (3d6+18/19–20
plus push)
Space 20 ft.; Reach 20 ft.
Special Attacks dimensional plummet, push (slam, 20
feet)
Spell-Like Abilities (CL 18th; concentration +24)
At will—dimension door, true seeing

3/day—create portal, quickened dimension door
S TAT I S T I C S

Str 46, Dex 19, Con 30, Int 5, Wis 26, Cha 23
Base Atk +15; CMB +37 (+41 bull rush); CMD 51 (53 vs.
bull rush)
Feats Awesome Blow, Critical Focus, Greater Bull Rush,
Improved Bull Rush, Improved Critical (slams), Improved
Initiative, Lightning Reflexes, Power Attack, Quicken SpellLike Ability (dimension door), Staggering Critical
Skills Climb +26, Fly –10, Perception +31
Languages Aklo
SQ bound to master, no breath
ECO LO GY

Environment any ruin
Organization solitary
Treasure standard
SPECIAL ABILITIES

294

Bound to Master (Ex) An abyssal custodian is bound to a
powerful entity, creature, or cult, and does all it can do to
serve that bound master. If its master or cult is destroyed,

the abyssal custodian becomes staggered until it gains a
new master. At the GM’s discretion, certain rituals or other
events can break this bond. Rituals to bind an abyssal
custodian into service exist, but are rare, dangerous, and
complex, and require the abyssal custodian’s consent

(an abyssal custodian will never consent to serve a mere
mortal such as a player character).
Create Portal (Sp) Up to three times a day, an abyssal
custodian can create an invisible, one-way portal, as
per the gate spell, but only to a location within 1 mile
of the abyssal custodian. This portal cannot be used to
call creatures. True seeing or detect magic reveals the
portal’s presence, but does not reveal what lies beyond
the portal. The portal itself is thirty feet in diameter, and
once created, persists for 10 rounds before vanishing. This
ability functions as an 8th-level spell for the purposes of
concentration checks and the like.
Dimensional Acclimation (Ex) An abyssal custodian
swiftly acclimates to changing environments after
dimensional travel. If it begins combat by appearing via
a portal or dimension door, it gains a +4 bonus on its
Initiative check. An abyssal custodian is never disoriented
as a result of using dimension door and is immune to
effects that would banish it or otherwise forcefully
transport it to another plane against its will.
Dimensional Plummet (Ex) An abyssal custodian does
not need to appear on a surface capable of bearing its
weight when it travels via a teleportation effect like its
portal or dimension door. If an abyssal custodian does not
elect to begin flying immediately when it appears in midair, it can make a plummet attack on hapless creatures
below. Treat this as a charge attack that allows it to make
a single slam attack against any creature that is adjacent
to its space when it lands. The abyssal custodian takes
normal falling damage from a dimensional plummet. Any
creatures that occupy the abyssal custodian’s space when

it lands are crushed for an amount of damage equal to
the falling damage the abyssal custodian endured. A
Medium or smaller creature that takes this damage is
knocked prone and pinned by the abyssal custodian. A
Large or Huge creature is knocked prone and pushed
into an adjacent space next to the abyssal custodian. An
abyssal custodian that uses dimensional plummet to land
on a Gargantuan or larger creature deals its crush damage
as normal but has no other effect on the target, and the
abyssal custodian itself is pushed into an adjacent space
and falls prone as a result. A successful DC 30 Reflex save
made by a Huge or smaller creature allows it to take half
damage and be pushed into an adjacent square. The save
DC is Constitution-based.

These entities were once just ordinary arthropods, like
a terrestrial carrion or dung beetle, but this particular