Archives of Nethys

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Template Grafts | Universal Monster Rules

Mnemonic Stalker

Source Starfinder #43: Icebound pg. 57

Mnemonic Stalker CR 13

XP 25,600
CN Medium outsider (incorporeal)
Init +4; Senses darkvision 60 ft., thoughtsense (120 ft.); Perception +23


HP 190
EAC 26; KAC 27
Fort +14; Ref +12; Will +16
Defensive Abilities incorporeal, mnemonic predation


Speed 30 ft.
Melee touch +21 (1d6 Int drain)
Ranged mnemonic tendril +23 (2d10+13 C & P; critical stun)
Spell-like Abilities (CL 13th)
3/day—mass baleful polymorph (5th level, DC 24), mind thrust (5th level, DC 24)
6/day—confusion (DC 23), cosmic eddy (DC 23), dimension door, greater song of the cosmos (DC 23)
At will—dispel magic, mental block (DC 22)


STR +0; DEX +4; CON +0; INT -3; WIS +6; CHA +8
Skills Acrobatics +23, Disguise +28, Stealth +28
Languages can’t speak; telepathy 100 ft.
Other Abilities astral travel, change shape (deific mimicry [DC 21])


Environment Astral Plane
Organization solitary, pair, or pack (3–5)

Special Abilities

Astral Travel (Su) A mnemonic stalker can take a full action to travel from the Astral Plane to the Material Plane or vice versa. When not on the Astral Plane, it gains the extraplanar subtype.
Deific Mimicry (Su) As a swift action, the mnemonic stalker can telepathically probe the mind of a creature within 100 feet, seeking concepts and images of a deity the target worships. As part of this action, the mnemonic stalker changes its shape, appearing as that deity. Alternatively, if the creature doesn’t revere a deity, the stalker changes shape into an individual of the creature’s species. Creatures that succeed at a DC 21 Will save recognize the altered shape as false but don’t see the stalker’s true form. The mnemonic stalker can maintain only one such shape at a time. This is a mind-affecting effect.
Mnemonic Predation (Su) Three times per day, when a creature casts a spell the mnemonic stalker knows, the stalker can take a reaction to consume the spell. The caster expends the spell, but the spell has no effect, and the mnemonic stalker regains one use of a spell-like ability of the same level or lower.


Thanks to their psychic predation and shapeshifting powers, these formless creatures from the Astral Plane are often mistakenly believed to be either gods or devils. Mnemonic stalkers exist outside traditional understandings of good and evil; they consume the thoughts of thinking creatures for nourishment, yet aren’t sapient themselves. They know only the impulse to feed, following their innate attraction to living creatures’ thoughts using psychic sensory organs incomprehensible to denizens of the Material Plane.

For millennia, mnemonic stalkers preyed upon an ancient, now-forgotten civilization that once thrived on an unknown world in the Vast. Stalking the shadows of sacred sites and flitting unseen through bustling communal spaces, their predation inadvertently caused the native species to devolve into more instinctual, less intellectual beings—thus depriving mnemonic stalkers of their food source. Nearing starvation, mnemonic stalkers left their homeworld and began to hunt through the Astral Plane for new food sources.