Is this sentence clear and worded correctly?

FYI- Szass Tam is the undead wizard. Although Bane made a pact with Szass Tam, he told the undead wizard that his priests and other worshipers would still aid the Council of Zulkirs in order to ensure that he would benefit no matter which side ultimately won the war. Szass Tam knew that the magical strength that Bane gave to him would gradually fade, so he decided to exploit his new power immediately.