Prue watched the Master drink the potion and get in position, then watched as Fred got the machine going. She nodded as she and Phoebe were given the thumbs up. Tightening her hold on Phoebe's hand, mostly out of the fact something in the back of her head kept telling her not to do this, she looked at the piece of paper with the spell Phoebe had written. She began saying the spell along with her sister.
As they chanted the spell, Prue lifted her gaze to watch the Master, to watch as magic and technology came together. At first, nothing but the machine was doing anything. The place where the Master stood began to glow around him with some sort of blue-white energy. Prue forced herself to focus completely on the spell on her paper. She'd been here long enough to know their magic needed a lot of oomph behind it to work in this world, and she was prepared to give all of her strength in this if need be. As she focused herself, she stopped paying attention to what was happening around her. All she was aware of where the words she was saying, Phoebe's hand in hers, and the magic they both were conjuring up.