Necrokinesis

Necrokinesis is a highly taboo form of conduit magic, where the material housing the sentience is (usually recently deceased) flesh and bones, particularly but limited to those of human beings. It is a shunned and often outright outlawed practice, and is exceedingly difficult to perform well. As a result, relatively little is known about it.

Necrokinesis is not the same as necromancy - communication with the spirits of the deceased.

Types
Necrokinesis can and technically does refer to any kind of conduit magic, made using animal matter, including simple trigger mechanisms. However, the term usually is understood to refer to more sinister applications: using the preexisting organic material framework for a magical construct, i.e. "animating" a corpse through magical means. Such constructs can be categorised:
 * Revenants are short-lived and created from recently deceased corpses. Revenants use magic and residual chemical power to work the muscles and ligaments of their bodies, and as such are characterised by uncannily fluid and human-like movements. Expertly crafted Revenants have been said to even have the capacity of speech and emotional expression, though at least the latter is likely only mimicked or muscle memory.
 * Revenants are easier to animate than other types, but fall apart sooner, as their soft tissues decay and degrade.
 * "Zombies" are made from older corpses and are significantly more durable. While still relying on the bone framework for stability, it primarily is magic that moves the body. They tend to move in a more mechanic, artificial way and are generally not capable of even imitated speech, as they lack or have damaged vocal chords, airways, lungs or the muscles operating them. Zombies are long-lived and can survive the complete decay of their soft tissues, becoming visually similar to bonelings, though they lose some function / become more clunky in their movement as they do so.
 * Bonelings are created from skeletons free of flesh .They are the hardest to make, as they require the creator to provide the vast majority of sentience for operating the body, since they can no longer rely on residual sentience in muscles and connective tissue. On the other hand, Bonelings are the most reliable and durable form of necrokinetic constructs. They only use magical energy to power their movement.

Controversy
The practice of necrokinesis is, perhaps understandably, very controversial. Even just using animal bone as the material for a conduit is shunned in most of Gondala. Creation of animated corpse constructs is considered a capital crime in the Republic of Coedor and many other places.

In general, all types of constructs using human remains are controversial due to ethical and moral considerations. However, it is specifically Revenants and, to a lesser degree, Zombies who are the most problematic - the recently deceased bodies still contain residual sentience of their human owners. On the one hand, it is this sentience that makes Revenants comparatively so graceful and agile. On the other hand, the presence of this sentience also means that the construct might retain some vague memories, quirks and idiosyncrasies of the deceased person, such as motor tics and particular mannerisms. This often leads to similar ethical discussions about identity (and slavery) as those surrounding ghosts.