This does not include mind control and the like (that would normally be part of enchantment/charm magic), and once things are dead they become the provenance of necromancy/Thanaturgy (although many systems do place these workings into the school of necromancy, or as part of healing magic and decline to create a seperate school). Chiurgy (a primitive term for surgery) is also used to describe this sort of thing … but less commonly.
Depending on the setting, biothaumaturgy may be used for good - allowing miraculous surgical cures to all kinds of ailments, or as a source of body horror. Sometimes it will be used for both.
- In China Miellville's Bas-Lag stories, biothaumaturgy is a source of body horror as criminals are Remade into forms that the courts decide offer poetic justice for their crimes. Values dissonance is to be expected. It is noted that in this setting, biothaumaturgy can be used to benefit the recipient, but generally isn't. Especially not in New Crobuzon.
- The Tzimice of White Wolf's old World of Darkness used the biothaumaturgy of "vissicitude" to sculpt their servants to suit their twisted aesthetics.
- J. K. Rowling's Harry Potter stories include several instances of magic being used to achieve fairly impressive feats of healing.
Game and Story Use
- This can be applied at a variety of levels - from magical hybridisation ("a mad wizard crossed an X with a Y and created the species of algebrae!") and surgical modifications to techniques that sculpt the subject like putty and those than generate separate organisms and/or implants that can be used for (often permanent) alterations.
- Body horror is to be expected … recycling concepts of cyberpsychosis from cyberpunk may help.
- That said, insanity should probably precede voluntary modifications and follow involuntary ones … you'd be mad to want your arm removed and replaced with a bunch of tentacles, and if someone did it to you without asking you'd probably suffer at least some psychological harm as a result.
- The "white" side of this magic, on the other hand, is likely to be magical surgery (that's that chiurgy again) at least as good as real life C21 techniques, maybe even to the extent of healing broken spines, and re-growing damaged body parts. Without traditional fRPG "healing magic" this may be an extremely big deal.