The Viskr have an-- understanding with Paradox-spirits. They see things in much the same way that the Weaver's own antibodies do; basically, if something shouldn't be there, it's offensive and must be punished. Though they cannot command the Paradox-spirits, they can call things to their attention, and they often do so. This powerful rite simply marks something as 'wrong.' Once that's done, the Paradox-spirits decide what to do about the matter.
The ritemaster rolls Wits + Occult, difficulty 6, and makes a mark on the target by touching it. In cases where the target is human or a mage, full contact must be made, even if it's only a handshake or a light brush against the target. Each success increases the chances that a Paradox-spirit will react immediately to the situation, meting out punishment for any Paradox the mage - or other entities, such as spirits which should not be in the physical Realm - has accrued. In the case of mages, the Paradox-spirits exact revenge as they always have. In the case of spirits, Paradox-spirits normally shove them back into the Umbra rather abruptly. In the case of mundane targets, the rite simply makes the chances of phenomenal good luck, or equally outrageous bad luck, less likely.