Are these two sentences clear and worded correct?

FYI- Hezass is the governor and Szass Tam is the lich. Tammith told Hezass that Szass Tam had intended for him to betray the lich to the Council of Zulkirs. However, now that Hezass had accomplished that task and convinced the Council that his army was going to assist their forces in the fight at the Keep of Sorrows, Szass Tam wanted to secure his allegiance, so Tammith secretly transformed the governor into a vampire.