When the knight arrived, the tides surely changed, and for the worse. Yggdrasil bared ill for the battle and everyone engaged save the old sharpshooter. Sierra held her blade downwards and angled, the razored edge faced towards the old man and Platinum Knight. The sisters downright panicked, much to Sierra's dismay, and Mei seemed insistent to piss the men off as much as possible, by proceeding to attack with clear signs of not backing down. A battle would not ensue, however, as Sierra lifted her blade and pointed the tip in a staging line at the knight and now hunched over sharpshot. Then she tilted it down towards the ground and allowed it to rest on the floor. With both girls gone, and the only ally remaining being the monkey, defeat was inevitable. 

Sierra spoke then, at the man, and the knight, and the monkey. However, her voice did not come out as her usual tone, nor the tone that had followed the activation of her tome. Instead, a dark, emotionless voice emerged from her mouth; a sinister, distant and deep sound - as if she had been possessed.
[b][colour=DarkSlateGray]"We would severe you where you stood, Knight, but we have further use for you."[/colour][/b] it said, it's voice echoing down the hall and into every hole, crevice and opening around, [b][colour=DarkSlateGray]"But understand it is for no reason than research. Not even you can escape the Void, Knight of Silver. Nor the Knight of Crimson, Aqua or Gold, or even the Imperator herself."[/colour][/b] it finished, glancing over the people present with distant, borrowed eyes. Then it lifted the sword, and it began to flow pure white, but no light emitted from it. The it vanished, shrinking away until it no longer existed. It brushed its hand across the watch dangling from its jacket, and in an instant the hand vanished, only to reappear again in a fraction of a second. Reaching towards the watch, it grabbed something out of the air and threw it against the ground. Seconds passed where nothing happened, but then, from the ground, a bolt of lightning rose up and struck the ceiling, before filling the hall with an acrid, burnt smell like no other. 

After the smoke cleared, however, Sierra was not there. She was, instead, at home, where she had contracted some illness making her slightly sick. It was a new day  - a day where she wouldn't leave the house unless Librarian called.