Vicissitude

Vicissitude is the trademark discipline of the Tzimisce clan, and one of the most horrifying disciplines in existence. Using Vicissitude, an experience Tzimisce can sculpt the flesh and bone of a subject, making the subject a creature of alien beauty or gnarling them into a deformed monstrosity. Tzimisce use Vicissitude on themselves extensively, reforming themselves into alien or frighteningly normal creatures.

Outside of Thaumaturgy, Vicissitude is the most creatively applied of the disciplines, usually in tandem with extensive ghouling. In particular, the Tzimisce tend to deform their ghouls into war-forms, szlachta, which are optimized for combat through extensive bone plating, spiked forearms and other modifications. Tzimisce will also sell their services as flesh sculptors, particularly to the Nosferatu who will buy: the effects of Vicissitude are permanent.

Vicissitude is intimately tied to clan Tzimisce, practice of the discipline is mandatory for the Path of Metamorphosis and the discipline can only be learned by someone who has at least tasted Tzimisce blood. This is common in the Sabbat through the Vaulderie, but anyone demonstrating Vicissitude in the Camarilla has some explaining to do.

Revisions
Vicissitude can be played as a form of disease, various supplements have indicated that the discipline has some bizarre warping effects on the character's psyche. Dirty Secrets of the Black Hand outlined the idea of souleaters, the natural form of Vicissitude as an alien parasite. This idea has since been mercilessly wiped from WW continuity.