The Web of Dreams
The Web of Dreams uses nightmares to tie some action the caster wants the victim to avoid to the victim's own fears. The master of can proscribe any action, from taking hostile action against a specific person, using a specific weapon, going to a specific place, voting for or against a specific thing, or anything else the sorcerer wants the victim to avoid.
System: The caster must prepare a mixture of vampiric vitae and a personal relic belonging to the victim in a small cauldron made of lead. He must then chew a live, poisonous spider into pieces, and spit the remains into the mixture. Then, he blows hashish smoke over the cauldron, and intones the victim's name, along with a verse enjoining the victim to avoid the proscribed action. Using the True Name of the victim reduces the difficulty of the ritual by 1.
The Web of Dreams invokes a nightmare, similarly to Spiders in the Mind, except that the proscribed action is somehow involved. If the nightmare runs its course, the victim suffers die-pool penalties as normal. Whether or not the victim avoids the nightmare, for the next lunar month, any time he attempts the proscribed action, he must succeed in a courage roll at a difficulty equal to the caster's successes or take the opposite action out of irrational fear. The exact effects are up to the stoyteller. A botch afflicts the caster with both the nightmare (which resists alteration with the Dreaming skill) and the compulsion, as if each 1 rolled were a success.