From 1d4chan

A strange Dark Eldar tool that is a sister to the equally weird Hexrifle.

The Ossefactor employs weaponized osteocytic impulsion-waves, normally used by the Haemonculi to craft bone structures and fashion spinal sumps. It projects a focused overdose of this energy at its victim, triggering uncontrolled osteocytic multiplication. It was originally derived from study of the mutations that allowed the Black Dragons to grow bone blades out of their arms and heads.

Bones twist and lengthen violently, shooting out dozens of spurs like the branches of some hideous tree. The luckless victim is rent apart by their own warped skeleton even as their horrified squad mates find themselves impaled on the calcific spears that burst from their body. Depending on the Haemonculi's mood, these victims are usually slain instantly... except when they are not.

The Ossefactor is a horrific weapon that has the ability to prolong the victim's suffering thanks in part to the medical skill and genetic mastery of the Haemonculi. Of all the DEldar weapons, the Ossefactor is an intentionally methodical weapon. Whilst Dark Eldar Laser Weapons provide a relatively quick and fast death, Splinter Weapons uses neurotoxins that create a fast but painful death and Liquifier Guns quickly burns off any pain receptors, the Ossefactor deliberately and sadistically make their victim suffer excruciating death as their body mutilates itself. Not even the Shredder comes close.

Most often then not, the victim dies from pure shock before the boneitis starts to act like biological spike bombs.

Weapons of the Dark Eldar
Ballistics: Splinter Pistol - Stinger Pistol - Terrorfex
Directed-Energy: Drukhari Blast Pistol - Fusion Pistol
Basic Weapons:
Ballistics: Shardcarbine - Shredder - Splinter Rifle
Directed-Energy: Blaster
Special Weapons:
Ballistics: Tormentor Helm - Splinter Pods
Chemical: Destructor - Liquifier Gun
Warpcraft: Eyeburst - Tormentor
Other: Hexrifle - Ossefactor
Heavy Weapons:
Ballistics: Phantasm Grenade Launcher - Splinter Cannon
Directed-Energy: Dark Lance - Haywire Blaster - Heat Lance
Vehicle Weapons:
Ballistics: Horrorfex - Implosion Missile - Cluster Caltrop Pod
Directed-Energy: Disintegrator Cannon - Monoscythe Missile - Pulse-Disintegrator
Storm Vortex Projector - Void Lance - Dark Scythe
Chemical: Necrotoxin Missile
Other: Shatterfield Missile - Spirit Vortex - Stinger Pod
Ship Weapons:
Ballistics: Scythe Missile Launcher - Torpedo
Directed-Energy: Phantom Lance - Heavy Starcannon
Non-Firearm Weapons:
Melee Weapons Dark Eldar Combat Weapons - Dark Eldar Power Weapons
Grenades & Explosives Plasma Grenade - Haywire Grenade - Void Mine