Archives of Nethys

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Template Grafts | Universal Monster Rules

Carnivorous Crystal

Source Starfinder #9: The Rune Drive Gambit pg. 56

Carnivorous Crystal CR 11

XP 12,800
N Medium ooze (earth, extraplanar)
Init -1; Senses blindsense (vibration) 60 ft., sightless; Perception +20
Aura infrasonic hum (60 ft., DC 18)


HP 180
EAC 25; KAC 25
Fort +15; Ref +8; Will +11
Immunities cold, electricity, ooze immunities, radiation; Resistances fire 15
Weaknesses vulnerability to bludgeoning and sonic


Speed 20 ft., climb 20 ft.
Melee slam +23 (4d6+17 S plus grab; critical bleed 2d6)


STR +6; DEX -1; CON +7; INT —; WIS +0; CHA -5
Other Abilities mindless, no breath


Environment any (Plane of Earth)
Organization solitary, pair, or cluster (3–5)

Special Abilities

Crystallize (Su) A creature made of flesh that ends its turn grappled by a carnivorous crystal must succeed at a DC 18 Fortitude save or become staggered. If a creature already staggered from this ability fails this save, it becomes paralyzed. A creature staggered or paralyzed by this ability but not grabbed by a carnivorous crystal recovers completely at the end of its next turn.

A creature that remains grabbed while paralyzed by this ability must attempt a third saving throw; on a failure, it becomes an amalgam of crystal and flesh, unconscious but alive. A creature in this crystallized state must succeed at a DC 18 Fortitude saving throw each day or die. If receiving successful long-term care, the creature gains a +4 bonus to this saving throw and needs to attempt it only once every 3 days. The crystallization is cured after two successful saving throws. Remove affliction allows a creature to automatically succeed at the saving throw, but an affected creature can benefit from this spell only once every 24 hours. Flesh to stone reverses this effect immediately.

Infrasonic Hum (Su) A carnivorous crystal emits infrasonic vibrations that act like static for any sense that relies on vibration, rendering it useless, although carnivorous crystals are immune to this effect. In addition, any creature that can hear must succeed at a DC 18 Fortitude saving throw within the aura or become dazed for 1 round. A creature that successfully saves or becomes dazed by the aura can’t be dazed by any carnivorous crystal’s infrasonic hum for 24 hours.


Rare natives of the Elemental Plane of Earth, carnivorous crystals feed on minerals and metals, transforming them into crystalline substances. They can alter flesh in a similar way and then consume it, but carnivorous crystals are predators only in the sense that an amoeba is, as these creatures are both mindless and indiscriminate about their prey. They reproduce through fission, but only very slowly and in areas with ample food.

Amoral technomancers capture carnivorous crystals and implant them with magitech that stimulates the creatures’ aggression. The agitated oozes are confined to breakaway containers, which allow them to be dropped safely into enemy territory. The augmented oozes then kill any fleshy creatures in the vicinity. This magitech burns out in a few days, so the creatures can either be recovered for further use or left in their new homes. This practice means carnivorous crystals can be found in unexpected places, such as abandoned space stations, derelict freighters, and planetoid mines.