Felis Negrum
This ritual turns the thaumaturge or another individual into a black cat. The thaumaturge must burn the whisker of a black cat or the skin of a white cat and inscribe the subject's name on a piece of glass in her own blood.
System: If the infernalist uses the ritual on herself, she can change back at will. If used on a ghoul, the spell lasts only 24 hours. If used on another vampire, the spell lasts for 12 nights minus one per Willpower point (permanent, not pool) the victim possessed at the time of the transformation. The target may resist whether she knows precisely what is happening or not, by winning a resisted roll against the thaumaturge's Willpower. This ritual requires the caster to spend one blood point. The subject acquires all Traits - including Mental Attributes - of a cat for the duration of the transformation.