Riddle Phantastique
The Kiasyd has knowledge of many hidden and intriguing truths. He can phrase these enigmas as a vexing riddle, causing whoever hears the Riddle Phantastique to do nothing but try to solve it. The Riddle is so impenetrable that it can actually damage the fragile brains of those who think about it. Malkavians and other deranged individuals sometimes have easier times solving the Riddle, but at other times it plagues them by driving them even more insane.
System: The player rolls Manipulation + Occult (difficulty of the victim's Willpower). After a successful roll, the victim can do nothing but sit and ponder the Riddle until she accumulates three times the riddler's successes. The subject rolls Wits + Occult (difficulty 8, plus or minus the number of derangements the victim has, at the Storyteller's discretion). She makes this roll as soon as she is told the Riddle, and then once per hour until she has gathered enough successes. Should the victim botch on a roll to solve the Riddle, she takes one level of lethal damage as the mystical enigma racks her body, and she loses one success from the accumulated total. This damage cannot be healed until the Riddle has been solved. The riddler can end this trance just by telling the victim the answer, but no one else can do so.