This smooth-featured, humanoid creature appears to have skin made entirely of mirrored glass.
Soulsliver CR 2
NE Medium outsider (extraplanar, shapechanger)
Init +7; Senses darkvision 60 ft., low-light vision; Perception +7
AC 15, touch 14, flat-footed 11 (+3 Dex, +1 dodge, +1 natural)
hp 19 (3d10+3); fast healing 1
Fort +4, Ref +6, Will +2
Resist acid 5, fire 5
Weaknesses vulnerable to sonic
Speed 40 ft.
Melee 2 slams +5 (1d4+2)
Special Attacks death throes
Spell-Like Abilities (CL 3rd; concentration +4)
Str 14, Dex 17, Con 12, Int 11, Wis 12, Cha 13
Base Atk +3; CMB +5; CMD 19
Feats Dodge, Improved Initiative
Skills Acrobatics +9 (+13 when jumping), Bluff +7, Disguise +7 (+11 when using change shape), Perception +7, Sense Motive +7, Stealth +9; Racial Modifiers +4 Acrobatics when jumping, +4 Disguise when using change shape
Languages Aklo, Common
SQ change shape (any humanoid, alter self), compression, mirror travel, perfect copy, sound mimicry (voices)
Environment any land (extraplanar)
Organization solitary or gang (2–5)
Death Throes (Su) When a soulsliver is killed, its body explodes into jagged glass shards that deal 2d6 points of piercing and slashing damage to creatures within a 20-foot-radius burst (Reflex DC 12 half). The save DC is Constitution-based.
Mirror Travel (Su) At will as a standard action, a soulsliver can crawl into any mirror as if it were a door or window, instantly transporting itself to another mirror within 500 feet as if using dimension door (caster level 7th). It can remain within that mirror indefinitely, or on its next turn crawl out or use this ability again. Its compression ability allows it to enter or exit Diminutive or larger mirrors. It can only exit a mirror if it is using change shape to take a specific creature's form.
Perfect Copy (Su) When a soulsliver uses change shape, it can assume the appearance of a specific individual. However, it is always the mirror image of the person it copies, which might give away that something is wrong.
A soulsliver is an extradimensional shapechanger that lurks in the half-dimensions behind mirrors. It watches creatures on the Material Plane through reflective surfaces, assumes their likeness, then crawls through the mirror to kill and feast upon its prey. Whether they are bizarre offshoots of the doppelganger race or originate from some aberrant magic used to create a demiplane, soulslivers are responsible for many unsolved murders, and their mirror travel makes them hard to catch.
A soulsliver causes trouble for a short while in its assumed form, then retreats through the mirror to its home plane. Its native plane is an aspect of the Plane of Shadow, with reversed and grossly distorted creatures and scenery from the Material Plane.