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Creatures in Mythic "Xiomorn" Category

Vault Builder208

Xiomorn, Vault Builder

This towering, spindly, four-armed entity appears to be made of stone and crystal, yet it moves with a fluid grace.

Mythic Vault Builder CR 20/MR 8

Source Planar Adventures pg. 252, The Emerald Spire Superdungeon pg. 159
XP 307,200
LN Medium outsider (earth, elemental, extraplanar, mythic)
Init +10; Senses darkvision 60 ft., tremorsense 120 ft.; Perception +26
Aura frightful presence (30 ft., DC 27)


AC 38, touch 21, flat-footed 27 (+10 Dex, +1 dodge, +17 natural)
hp 317 (19d10+213); fast healing 5
Fort +13, Ref +21, Will +17
Defensive Abilities block attacks, fortification (50%); DR 10/adamantine, bludgeoning, and epic; Immune elemental traits; SR 31


Speed 40 ft., burrow 30 ft., climb 40 ft.; earth glide
Melee 4 claws +29 (2d4+10/19–20 plus crystallization)
Special Attacks crystal burst, crystallization, mythic magic 3/day, mythic power (10/day, surge +1d10), rend (2 claws, 2d4+9), xiomorn spellcasting
Spell-Like Abilities (CL 19th; concentration +27)
At will—dispel magic, greater teleport (self plus 50 lbs. of objects only), shatter (DC 20), statue (DC 25), stone shape, stone tell
3/day—command stone (DC 27), flesh to stone (DC 24), spike stones (DC 22), wall of stone
1/day—permanency, summon monster VII (earth elementals only), symbol of scrying
Wizard Spells Prepared (CL 19th; concentration +28)
8th—earthquakeM, maze, repel metal or stone
6th—disintegrateM (DC 24), flesh to stoneM (DC 24)


Str 22, Dex 31, Con 25, Int 29, Wis 18, Cha 26
Base Atk +19; CMB +25 (+31 sunder); CMD 46 (52 vs. sunder, 50 vs. trip)
Feats Ability Focus (crystallization), Combat Reflexes, Dodge, Extra Mythic PowerM, Improved Critical (claw), Improved SunderM, Iron Will, Mobility, Power Attack, Spring AttackM, Weapon FinesseM
Skills Climb +33, Craft (sculpture) +37, Disable Device +27, Heal +23, Knowledge (arcana, planes) +39, Knowledge (dungeoneering, engineering, geography, nature) +28, Perception +26, Sense Motive +26, Spellcraft +31, Stealth +32, Use Magic Device +30; Racial Modifiers +8 Craft (sculpture), +8 Knowledge (arcana), +8 Knowledge (planes)
Languages Terran; telepathy 300 ft.
SQ item mastery, item shaper, secret of the Vault Seeds


Environment any
Organization solitary, pair, or foundation (2 plus 4–20 Vault Keepers)
Treasure triple

Special Abilities

Command Stone (Sp) This functions as dominate monster but affects only creatures with the earth subtype or stone constructs. When used against a construct, this ability overcomes spell resistance, but the effects last for only 1 round per level.

Crystal Burst (Su) As a standard action once every 1d4 rounds, a Vault Builder can create an explosion of razor-sharp crystals at a range of up to 120 feet. These crystals fill a 30-foot-radius burst and deal 20d6 points of piercing and slashing damage (Reflex DC 26 half). The save DC is Constitution-based.

Crystallization (Su) A creature struck by a Vault Builder’s claw must succeed at a DC 28 Fortitude save or take 2 points of Dexterity drain. On a critical hit, a target that fails its save instead takes 4 points of Dexterity drain. As long as a creature suffers this drain, portions of its body appear as living green crystal and it gains the earth creature subtype. A creature whose Dexterity score is drained to 0 in this manner transforms into a green crystal statue, as if affected by flesh to stone. The save DC is Constitution-based.

Item Mastery (Ex) A Vault Builder can always activate spell trigger and spell completion items as if the spell were on its class list.

Item Shaper (Ex) For the purposes of crafting magic items or constructs, a Vault Builder is treated as though it had all item creation feats. It requires only 1 hour of work per 1,000 gp of the item’s base cost, instead of 8 hours. For items made primarily of crystal, stone, or earth, it requires only 30 minutes, and the item’s base cost is halved.

Secret of the Vault Seeds (Su) A Vault Builder has an innate understanding of Vault Seeds—magic-rich artifacts that create the vaults found on many Material Plane worlds. This process includes finding the raw crystals the seeds are formed from on the Plane of Earth, faceting the gem and using magic to grow it into its shape, and nurturing the seed with the proper spells once it’s planted in the raw earth from which the vault will grow. A Vault Builder gains regeneration 10 while in a vault it created or directly helped create. No attack type causes this regeneration to stop functioning; a Vault Builder can be killed by hit point damage only if it is removed from its vault first.

Xiomorn Spellcasting (Su) This ability functions as simple arcane spellcasting (Pathfinder RPG Mythic Adventures 228), except the Vault Builder can change its spells each morning as though preparing spells, choosing a number of spells with a combined level equal to twice its CR. Each Vault Builder knows a number of spells with a combined level equal to three times its CR, choosing from the spells listed above, as well as create demiplane, mythic move earth, and terraform.


Xiomorns comprise two castes: the four-legged mythic Vault Builders and the two-legged non-mythic Vault Keepers. Both are among the most ancient forms of life—primeval elemental beings who travel to raw, new worlds upon the Material Plane, pursuing strange ecological investigations into the nature of life. The worlds these enigmatic beings have visited feature strange ruins in remote regions and immense, vault-like caverns deep underground where ecologies that shouldn’t exist flourish. Xiomorns have little interest in protecting a world’s indigenous life, except as necessary for their experiments’ goals, and wage war against such races when native empires encroach upon the xiomorns’ experimental realms.