Source: Book of Spirits p138
The spirit has a means of active camouflage. This might appear as an octopus’s skin that can change texture and color, or may be more mystical in nature. The spirit spends a point of Essence and remains still. As long as the spirit does not move, the camouflage remains active — up to a scene. This Numen can be used along with Hibernate to disguise the spirit while sleeping. Anyone trying to perceive the spirit suffers a negative modifier equal to the spirit’s Finesse.