Devil's Touch
The Tremere use this ritual to place curses upon mortals who earn their ire. Using this ritual marks an individual invisibly, causing all those who come in contact with him to receive him poorly. The mortal is treated as the most loathsome individual conceivable, and all who deal with him do anything in their power to make him miserable. Even bums spit at an afflicted individual, and children taunt him and barrage him with vulgarities.
System: The effects of this ritual last one night, disappearing as the sun rises. The mortal (it doesn't work on vampires) must be present when the ritual is invoked, and a penny must be placed somewhere on his person (in a pocket, shoe, etc.)