Fusion booster

The fusion booster was a highly advanced piece of equipment from Gallifrey. It was an unstable element, capable of an enormous conversion rate over very short periods. It was fuelled by anything that contains hydrogen atoms, including water. Omega transported one to Earth to build up energy to transfer with the Arc of Infinity. The Fifth Doctor sabotaged the booster and, therefore, foiled Omega's plan. (TV: Arc of Infinity)