Killer Copper Pieces: Sceadtwains

Is the flesh stronger than steel? Perhaps, perhaps. Certainly more fearsome.

These assassin-creatures of the fleshworkers are born from an induced twinning - the twins are then made to devour each other in the womb. One twin eats the other's flesh while the other eats the first's shadow. Then, it is born - one being, two bodies, one of flesh and one of shadow.

Unactivated, they resemble the human they would have been born as, their other body resting as a shadow in the light should. Activated to kill, and they are like an over-buttered bag of popcorn - soggy, wrinkled, warped and split, innards spilled onto outtards. Their shadow-self rises as an illusory duplicate, connected to their flesh-self by a black thread that wriggles along the ground like a worm.

Their leash (besides the indoctrination from a young age which should be practiced with all assassin-creatures) is the promise of return to and maintenance of their human form, to their ordinary life. Only their creator can do this. Masterless ones exist in the margins, bundled up like lepers - honed killers pushed to the edge.

They are

Sceadtwains

HD: 3 AC: 14 ATK: As weapon SAV: 9 MOV: As human who is really good at parkour INT: As trained assassin ML: 6
No. Appearing: 1d3

Peekaboo: A sceadtwain that's just been put into kill-mode gets a 4-in-6 chance of getting a surprise round. The sceadtwain's master must be in earshot to give the signal.

Bilocation: An activated sceadtwain has two bodies - one illusory and one physical. The bodies must remain within 30 feet of each other, and are connected by a black thread along the ground. If this thread is severed, the illusory body winks out of existence and re-emerges the next round from the physical body's feet. The thread can't be severed by cutting - it is itself a shadow - a solid obstacle must completely block the connection.

A sceadtwain can switch which body is illusory and which is physical once per round as a free action, including in response to an incoming attack. If something physical is within the illusory body when they swap, the sceadtwain takes damage as if telefragged.