Mule-Vi

Draba

A mule-vi (literally "ghost-sight") is always created from a piece of glass, normally a lens or lenses of some sort. A mule-vi has two separate uses. First, the device enables the Rom to see into the spirit world. The bearer must make a Perception + Magic roll (difficulty of 7) to activate the device. If successful, the Rom can sue the mule-vi to see into the spirit realm. The effect lasts for five minutes per success.
The mule-vi also enables the Gypsy to perceive the true nature of anyone he sees while looking through the lens. Thus vampires, werewolves, mages, wraiths and spirit-beings appear in their true form (or radiate magic in the case of mages) to the Rom. The Rom must make a Wits + Charisma roll (difficulty of the target's Willpower) to see through the target's false identity.
A mule-vi may be used a number of times equal to the successes the creator rolled making it before it cracks and becomes useless.