Fleshcraft

Direct manipulation of flesh through xiphaem. Strictly speaking, any xiphaem practitioner can do it. However, the result is a mass of barely coherent material, shredded internally by the projected structures permeating it. Ghouls, with their incredible natural regeneration, are unhindered by this and can manipulate flesh without sacrificing all of its structural integrity.
In non-ghouls, fleshcraft is only practical in long-term applications, such as reconstructive surgery. It's technically also possible with bones, though far more energy intensive.