Takhaff Uul belonged to the Yuuzhan Vong's priest caste. Uul held the position of High Priest dedicated to Yun-Yuuzhan, whom they considered the Creator. Following the events of the Battle of Coruscant, Uul made contact with Warmaster Tsavong Lah. He claimed to have experienced a vision where Yun-Yuuzhan expressed displeasure at not being properly honored for the invasion. According to Uul, the Creator desired that an entire planet be transformed into a temple in Yun-Yuuzhan's honor. However, the reality was that Takhaff Uul was secretly working alongside Master Shaper Ghithra Dal in a scheme to manipulate Lah. Aboard the shaper ship known as Fu'ulanh, Lah released a pack of rancors, resulting in the deaths of Uul, Dal, and others involved in their plot.