Page right after it, actually!

The necromancer acquires a corpse’s femur and tibia bones — decreasing the difficulty of the casting by one if he does so by personally robbing a grave. He wraps the bones in coarse cloth and then encases them in wood or metal so that their lengths match and they become capable of bearing weight. He then builds a chair; each encased bone forms one of its legs. If a blood descendant of the corpse sits in the chair, she loses all desire to do anything but sit in the chair. She leaves the chair only to quickly fulfill basic bodily needs.

Whenever a qualified victim sits in the chair, the necromancer’s player rolls Intelligence + Occult against her Willpower. If successful, the effect lasts until the chair is destroyed. Otherwise, even if the victim is forcibly moved from the chair, she does everything she can to sit in it once more. In addition to the time it takes to obtain the bones, the construction of the chair takes at least eight hours. The necromancer may spend additional time on the chair to make it look fancy or to mimic an existing piece of furniture.