Is the middle part of this sentence properly worded?

FYI- Kitiara is the highlord. In 356 AC, Soth was sent by Kitiara to assassinate a cleric of Paladine named Crysania Tarinius in order to thwart the highlord’s half-brother Raistlin Majere’s plans to enter the Abyss and challenge Takhisis for her position among the gods.