Be warned. Deathly Hallows Part 2 spoilers are ahead.
"You do realize, of course, that we cannot keep out You-Know-Who indefinitely?"
"That doesn't mean we can't delay him. And his name is Voldemort." The angry that spilled out of Minerva McGonagall while pronouncing that silly stupid name she'd been fearing for years, well she brought it back in quickly. "Filius, you might as well use it. He's going to try to kill you either way."
His departure from the age old stoned steps went unnoticed to her as she began summoning power from her core, coaxing it out for a spell she had been wanting to do, for ages. She turned around to the castle, lifting her wand in one hand, and outstretching the other. She took a small breath before uttering the words:
"Piertortum Locomotor!" Invisible waves of power seem to pour out of McGonagall's wand and hand as one stone knight fell from a story above. It let out a low growl, as two more joined it. Slowly they let out growls as well, craning their heads upward and marching out of the hall. More Knights joined them, and the sound of their marching increased. McGonagall seemed shocked for a split second, then faced forward as they marched pass her.
"Hogwarts is threatened. Man the Boundaries. Protect us. Do your duty to our school!" The conviction of her words seemed to release an certain amount of happiness that she was finally doing to fight a fear that had been controlling her actions the entire year (and she could fight it with a spell she had never before been able to use). She then noticed Mrs. Weasley was still standing next to her, in awe of the knights marching.
"I've always wanted to use that spell" Hands clasped together, McGonagall let a smile. Even in her giddiness she didn't miss the slight deranged look Mrs. Weasley gave her a second later.
I do not own Harry Potter. Reviews are appreciated as this is my first attempt of taking a small scene from any of the Potter films. You know you want to press that amazing blue button