AC 7
HP 117 (13d10 + 52; bloodied 58)
Speed 20 ft., climb 20 ft., swim 20 ft.
Initiative Dex -3 (7), Insight +1 (11), Perception +1 (11)
Proficiency +2; Maneuver DC 13
Saving Throws Str +3, Dex -3, Con +4, Int +2, Wis +1, Cha +2
Damage Immunities acid; bludgeoning, piercing, slashing
Condition Immunities blinded, deafened, grappled, fatigue, prone
Senses blindsight 60 ft. (blind beyond this radius), passive Perception 11
Languages Common, telepathy 180 ft.
Acidic Body. A creature that touches the mnemon or hits it with a melee attack while within 5 feet takes 9 (2d8) acid damage.
Amorphous. The mnemon can pass through an opening as narrow as 1 inch wide without squeezing
False Appearance. While motionless, the mnemon is indistinguishable from a black surface.
Mind Sense. The mnemon knows the location of all creatures within 180 feet that understand a language.
Ooze Nature. The mnemon doesn’t require air or sleep
ACTIONS
Multiattack. The mnemon makes up to 3 pseudopod attacks against different creatures.
Pseudopod. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 6 (1d6 + 3) bludgeoning damage plus 9 (2d8) acid damage, and the target is grappled (escape DC 13). Until this grapple ends, the target is covered with ooze. While covered with ooze, a target is restrained, can’t breathe or speak, and takes 9 (2d8) ongoing acid damage. The mnemon can’t attack a creature it is already grappling.
If a creature that understands a language is killed while grappled by this attack, the mnemon gains the creature’s memories.
Legends and Lore
With a History or Survival check, characters can learn the following:
DC 15 Watch for black floors! Mnemons are ooze creatures that can disguise themselves as smooth black surfaces.
DC 20 Mnemons use telepathic trickery to lure their victims. Mnemons devour a creature’s mind, and are sometimes willing to trade secrets.
A mnemon is an intelligent black ooze that traps and kills sentient creatures, psionically consuming their memories. Cunning hunters, mnemons use telepathy to entice unsuspecting humanoids into their clutches.
1 Disguised as a pool of black liquid: telepathically pretending to be a creature trapped inside the pool
2 Disguised as a black stone floor: telepathically claiming to be a traveler in trouble beyond the floor
3 Waiting in ambush on ceiling or wall
4 Undisguised: offering valuable secrets to those who approach
1–2 Wriggling drops of tar
3–4 Telepathic cries for help
5–6 Rusted metal objects: weapons, clasps and buckles, wires
Mnemons can dwell in any planetary environment.
CR 3–4 Mnemon
Treasure metal personal effects of varying ages (such as datapads, nonfunctional blasters, jewelry) worth 500 cr
Oozes are ambulatory, predatory amoeboid creatures that infest caverns and other dark places. A gelatinous cube is an ooze.