Stillfiend
This bizarre creature combines humanoid and insect anatomy, possessing the stump-necked torso of a man supported by a chitinous body; it waves two wickedly curved scythe-like limbs.

Stillfiend (CR 7; XP 3,200)
N Medium aberration
Init +8; Senses blindsight 120 ft., Perception +14
Defense
AC 19, touch 14, flat-footed 15
(+4 Dex, +5 natural)
hp 65 (10d8+20)
Fort +6, Dex +7, Will +8
Immune vision-based effects
Weakness light sensitivity
Offense
Speed 30 ft.
Melee 2 deadly claws +12 (2d4+4/15-20)
Spell-Like Abilities (CL 10th; concentration +10)
At-will—silence (W-DC 12)
3/day—passwall
Statistics
Str 18, Dex 19, Con 15, Int 13, Wis 12, Cha 10
Base Atk +7; CMB +11; CMD 25 (29 vs. trip)
Feats Combat Reflexes, Combat Expertise, Improved Initiative, Skill Focus (Stealth), Stand Still, Weapon Focus (deadly claws)
Skills Acrobatics +17, Intimidate +13, Perception +14, Stealth +23, Survival +14
Language Common (can’t speak); see Memory Feast
Ecology
Environment underground
Organization solitary or cabal (2-4)
Treasure standard
Special Abilities
Deadly Claws (Ex) The stillfiend’s claws score a critical threat on a 15-20. In addition, a stillfiend slaying a victim with a critical hit automatically decapitates the creature.
Memory Feast (Su) The stillfiend employs this macabre power to feast upon the memories of dead sentient beings. The stillfiend can perform this task on any individual head that it remains in contact with for one minute. Devouring a victim’s memories grants the aberration a +1 bonus to Intelligence and skill checks for one hour per sentient consumed; they also acquire access to the victim’s memories as if they had cast speak with dead at the 10th caster level. As a final insult, the stillfiend can affix the head to its neck stump, allowing it to speak in any language spoken by the decedent.

The stillfiend stalks subterranean necropolises and catacombs, voraciously feeding on the memories of the unfortunate departed, supposedly interred for eternal slumber—the more active the burial site, the better. These aberrant monstrosities have no compunctions about procuring fresher memory-food, though, and mortuary crews, clerics, and mourning families alike have had to battle stillspeakers hunting beneath the clean light of day. They frequently rely on their ability to pass through earth and stone to remain unseen, if they wish, as the living pay their respects to their dearly departed. Foul grave-bugs seen skittering through tombs are likely stillspeaker young, but egg clutches have not been observed.

On Porphyra
Large cities with active catacombs, like those of the Middle Kingdoms and the Pinnacle Lands, are commonly plagued with stillspeakers, and are the stuff of children’s nightmares in those civilized lands. Ironically, summoned elementals are often tasked to root them out.