"I don't see any-" Jake started saying before Merlin stopped him, picking up a rock and throwing it at the gateway. The rock never hit the door, it vanished. "Okay, good thing you stopped me," Jake said, letting out a nervous laugh.<br/><br/>"That's why I bought the Orb with us," Merlin said. "It's the only way of disabling that field, from this side of this gate anyway."