At least, that is what Umbra planned to happen.
Father boxes are miraculous machines, capable of creating boom tubes to transport people across vast expanses of space, among other functions. They were a game-changer, an ace up the sleeve, something that could be counted on. Which is of course why the Light, and by extension their operatives, counted on it so much. Without any shadows to move through, it was Umbra's fall-back plan. But they hadn't counted on one thing.
The boxes were precision instruments. They had to be, to operate so effectively. They could deal with minor stresses, minor problems, as long as the internals were all functioning correctly. But some of those internal mechanisms were metal. Which is why, the moment that Umbra specified to his newly arrived backup that the box was the key to his transport, those mechanisms were moved out of alignment. Not irreparably so, if she so chose Erza could move them back at any time, but most certainly not correctable in the midst of a fight. So when her foe pressed the button, there was a pause, as he expected he and his target to be moved away to a location of his choosing.
But nothing happened.
And in that instant, the moment where Umbra blinked once again in pain, he could see that she had already crossed the short distance between the two of them. Her steel-covered fist rocketed towards his jaw, seeking a blow that would take him out of the fight. His senses were impaired by the pain from his nose, and the effects it caused, and she was so fast; it would take more than luck to evade it. But she wasn't done. The metal support structure below Soundmaster shot up through the concrete, bands seeking to wrap around his ankles. It was doubtful that he would be able to escape imprisonment; he had arrived to the battlefield too suddenly to make an accurate assessment of his foe's capabilities. A mistake that he shared with his comrade.
However, it was well known that no plan was without fault. But to safeguard against the possibility of their escape, she was identifying every source of metal around her; and she noted several very, very useful ones indeed. The metal zippers on their pants, the metal pieces used in the construction of Umbra's armor, the tuning fork Soundmaster carried, the katana Umbra carried. And that was just the surface.
"I am going to give you both one chance. Leave now, don't come back. If you do not comply, I will end this fight with whatever means necessary."
OOC: I have two things to make note of. First, the presence of metal in the father box was verified with Bunda. Second... She means whatever means necessary. And there is no rule against killing PCs on the front page.
You have been warned.
IC:"Great. Let's go."Were the only words Samuel said, before he stepped off the edge of the building, much to the shock of his comrades. But when they looked over the side, they did not see what they expected; the lazy League member was standing a few yards below, perched on a square of blue light. After a pause, he created another one a yard or two lower down, dropping to it without hesitation. He looked up at the people still on the roof, and raised an eyebrow."Act lively now. I promise, the platform won't hurt you.""Much."