The Summer Knight suddenly snapped his fingers, having a eureka moment. "That was it! I knew I had forgotten something. Met an unusual individual, who admitted to working with the Brotherhood to build a ritual spell for them. They tried to back stab the builder, and the builder got away, so came to me and Frost in order to back stab them back. They warned us about it, and said they needed a certain item to more accurately and efficiently bring people over."