Bonesinger

They truly put the 'Bone' in 'Bonesinging'...

Bonesingers are Eldar artisans, weapon crafters, architects, masons, IT technicians, janitors, coffee brewers, firefighters, yadda yadda yadda. They possess the unique ability to shape the Wraithbone, without which the Eldar would be armless failures.

Essentially speaking, Bonesingers are the Eldfar equivalent to the Imperium's Enginseer, but fundamentally less awesome and more psychic. This is relatively true in both the fluff and crunch and they behave almost like carbon cutouts of each other.

Overview

These Eldar follow one of the many Paths along which their kind journey. Rather than focusing on combat, the Bonesinger is instead tasked with the construction and maintenance of Eldar structures and machinery. Usually through the psychic manipulation of Wraithbone, shaping and molding it into various items. This is done true psychically molding the fabric of Wraithbone through a 'chorus' of psychic energy, hence why they are called Bonesingers; they literally make structures through the power of music. You can't get more Elvish than that. While Wraithbone naturally repairs itself, the process can be accelerated by the psychic abilities of a Bonesinger. Bonesingers of the Il-Kaithe Craftworld are said to be the most skilled of the Eldar Bonesingers, able to practice their art even in the heat of battle.

While Wraithbone is capable of naturally repairing itself over time, the process can be greatly enhanced by the psychic abilities of a Bonesinger. Hence, whilst they practically never see combat, unless a Wraithlord breaks a leg or a Falcon's weapons go derp, they are always in the backline. Still, they managed to be in Dawn of War as the Eldar builder unit.

Curiously, while Fluff states that Bonesingers can be either male or female, all of the Bonesingers in the Dawn of War games are female (Or they sound female, cause god knows how anybody is gonna catch the gender of Eldar synth-voices). As you can imagine, with the name 'Bonesinger' and them being all female, it has led some to believe that they may also perform another use for....'Bonesinging'...

Crunch

Thanks to Made to Order, the old, sexy Bonesinger model was re-released for just one week only. He was also released with free rules, which you can check on the Warhammer Community page. The Bonesinger acts like an engineseer, able to heal units once a turn that have the keyword "vehicle" or "wraith." They can also cast smite, instead.