Yorik-Kul
this was the form of yorik coral used by the Yuuzhan Vong to control their slaves. A piece of yorik-kul was implanted into the body of a slave, usually near the neck. Because the yorik-kul was linked to its parent coral, it could be sent signals that were then imposed onto the will of the victim. Over time, the yorik-kul multiplied within the body of its victim, with coral spawn taking hold throughout the victim's body. In this way, the entire body was eventually at the mercy of the original coral. The introduction of yorik-kul into a non-Yuuzhan Vong body caused physical deterioration over time, as the coral spawn consumed the energy being created by the victim. It was also discovered that, over time, yorik-kul served to cut off a victim's connection to the Force.