The Master continued to be absorbed in his work. Or at least he was pretending to. In reality, the machine was complete. He absent-mindedly pretended to be working on the headband. Meanwhile he was really listening to Jenny approach. She was too used to sneaking up on normal people it seemed. The Master could hear her hearts beat. He gripped the headband on the sides and spun it into position. And just when she was about to strike he spun around hefting the headband up high. Without giving her time to react he plunged it onto her head. "Please, have a seat." He smiled holding out a chair for her and knowing she would have to obey.
He had lied to her earlier. The headband was a receiver not a transmitter. He was going to use her to control the rift. After all the energy was much to unstable to risk himself. And to make sure she did what he wanted? He had built a neural dampener into the device as well.