Soul Mask
The vampire with Soul Mask can project a halo (aura) that is different from the one that represents her actual condition or she may project no halo whatsoever. The vampire must burn blood to change her halo, in different quantities to effect different changes. Changing the halo's color (hence masking the underlying emotion) costs a single blood point. Changing its shade (to appear mortal or as a ghoul) costs two. Changing other characteristics (to display or hide magic use or diablerie, to suppress the halo altogether) costs three. The effect lasts for an entire scene, but the false halo can be dropped (or modified again through blood expenditure) at any time. Changing haloes requires an action and a moment for concentration, but is otherwise quite secure. Only if an observer has as many dots in Auspex as the character has in Obfuscate can he pierce the mask. In such a case, the observer's player rolls Perception + Subterfuge, opposed by the masked vampire's player, who rolls Manipulation + Subterfuge. If the observing vampire has more levels in Auspex than the masked character has in Obfuscate, he sees through the mask automatically.
Characters without any real experience at Soulsight can only suppress their haloes rather than change them. Soul Mask has no effect on other forms of deception, and it cannot be used by Assamites to mask their clan weaknesses.