Disclaimer: You what I'm going to write here, so just imagine it here. A/N: I borrowed the Thwimbles from Lisa's story (check under my favourite stories, Nothing Lasts Forever) and I use the prophesy in the fifth book to my advantage, you know, neither Voldemort or Harry is really alive until the other one is dead, they can only die by each other's hand, etc, etc.

***
Alisa flew. She flew far and fast into the forest before landing and transfiguring back. She was scared. It was happening, but it wasn't happening like it was supposed to. They were there too soon, and they weren't the right ones. Alisa had expected her father might strike early- but this was too unexpected. What was she doing in the forest? She couldn't flee simply because... But what choice did she have? She had to protect them, even if it meant facing far worse than death... she turned into a raven once again and set off toward the school, the least she could do was warn them....

***

Harry ran screaming toward the bathrooms... "RON!!! HERMIONE!!!!" They came running to him, he grabbed their hands and pulled them off, too out of breath to say anything more.
They chased after him, already knowing why they were being pulled by Harry, and weren't surprised by stopping at the front door. Quite out of breath, Ron begged Dumbledore, "Where is Alisa?!"
Dumbledore looked at him, "I'm not sure, but she certainly must be coming." The teachers began to gather around Dumbledore, and Hermione saw Draco sneak in, Dumbledore was about to address them all as Alisa transfigured back in mid-air, ending standing tall with the trail of her black dress resting behind her.
Everyone turned to her quite shocked, "Thwimbles!" She spat out, "He's got the Thwimbles!"
A grave look crossed Dumbledore's face, "Good god." he whispered, "But what can they do?"
"Nothing." Professor McGonagall said, "Unless the Avada Kedavra was said wrong to one of us... and we can tell that hasn't occurred."
Alisa turned to her, "And who is to say it's not going to be used incorrectly during the time we are out there? And who's to say that's all he has?"
"How many?" Dumbledore asked.
"Twelve, at least." Alisa said.
Ron and Harry were looking at Hermione, hoping for an explanation, she said quickly and near silently under Alisa's voice, "The Thwimbles come when the curse is done wrong... they take away all the happy memories of the person who was hit by the curse and all they are left with is hate. They can turn on the people they once loved."
"-I will go out there." Ron heard Alisa say when Hermione finished.
"What?" Ron asked at the same time as Snape, "You can't go out there with the Thwimbles," Snape continued, "They'd eat you alive!"
"I swore to protect this school, Severus, and I will do what I have to. My father will not harm me." Alisa said back to him.
Ron and Harry looked at each other, Alisa's father? Who? What?
"But who is to say the Thwimbles obey Voldemort?" McGonagall said.
"Good god, we are wasting time!" Alisa said, turning back to Dumbledore, "No one opens this door until it is all over." And she turned back into a raven before anyone could stop her, flying away and out the opening the mail-delivering owls usually flew in through.
"We can't just let her go out there alone!" Snape pushed through everyone, "There are other things besides Thwimbles out there!" he reached for the door.
"We can't!" Professor Flitwick said from no where, "The elf said not to open the doors!"
"Then I will go a different way out!" Snape said.
"If you're going out there, so am I!" Harry said turning toward the corridor with a side exit from the castle. Surprisingly, instead of trying to stop him, everyone followed him, wands at the ready.
"Beware all! You do not know what is out here!" Dumbledore called as they stepped outside. They were not greeted by what they had expected, Alisabelle fighting Voldemort's invisible Thwimbles like a mad woman, instead they found her standing directly across from Voldemort, in a sort of bubble. They looked at her for a moment too long.

***

"Draco, my boy!" Lucius said, drawing his son away from the group as-

"Avra kedvra!" Was heard from all around them, flashes of yellow light went everywhere. They all ducked and Dumbledore was shouting "Elemos!" Alisa didn't even look in their direction.
Total chaos broke out amongst the teachers as the Thwimbles set upon a few. Pretty soon Professor Flitwick, Madame Pomfrey, and Professor Sprout were taken by the Thwimbles after being hit by the purposely said wrong curse. The three laid sprawled on the ground, twitching slightly. Several of the teachers were taking out the Death Eaters, a surprisingly low amount had come. Several more teachers fell, along with Hermione, before the threat of the Death Eaters was diminished slowly, many frozen in curses, bound in ropes, or unconscious. Dumbledore yelled a binding spell, binding them all to one another and then the real hell broke loose.

***

"You will not have me." Alisa said harshly.
"If I do not, my little friends will." Voldemort said vindictively, "They'll get some of your friends, at the very least."
Alisa did not look where her friends were about to get massacred, "They are capable people, I do not worry about it." Though there was fear in her eyes.
"Well then, my daughter, tell me, what do you plan to do to protect your precious school?"
"I am going to end this here." Alisa said, her eyes flashing darker.
"Don't you know, I can't die unless Harry Potter kills me." Voldemort said with a small crackle.
"Oh no, father, that's not the only death you can receive," Alisa began to circle him, "You cannot die because you are not truly alive, you are not alive until Harry Potter is dead, but if Harry were to die, you would be alive enough to kill. Think about it." Alisa said, seeing the idea cross Voldemort's mind, "So, I believe you have a loose-loose situation here. If you kill Harry Potter tonight, then you can be killed, and either Dumbledore or myself will kill you without hesitation, and if Harry kills you tonight, well, you are still dead." She smiled slightly wickedly, "And of course, if you do not face Harry Potter tonight, then it's all pointless, isn't it?"
"Who says I will kill Harry Potter?" Voldemort said.
"And what would you do with him, lock him up just to keep him alive so you might live as well? It seems quite sad that you would keep your enemy alive because you are afraid of dying. You really are afraid of Dumbledore, daddy, I am ashamed." She said. She was just playing with him, buying time, but how much time could she get? Why did she need it? There was no way to solve this. She couldn't kill him.. she's couldn't trap him or bind him, he was too quick for that when his attention was focused.
"Ashamed you say? And you are not normally ashamed to have me as a father? Does that perhaps mean you don't hate me so much?" His smile became more sinister, "Perhaps you would join my side?"
And with that, Alisa had an idea, "Perhaps... I would." Voldemort's smiled drooped slightly, "You're criminal masterminds have been a bit slow, and to be honest, it bothers me. I can think of," She took another step toward circling Voldemort, "At least a dozen times and ways you could have killed Harry within the past hour."

***
Flitwick, Madame Pomfrey, and Professor Sprout, among the others had awaken, setting themselves upon specific teachers, it seemed each teacher was being fought by a half-dead counter part. How were the teachers supposed to fight off their own friends, mad with hate? Far worse than that, Hermione went after Ron, how was he to fight his best friend? He saw her coming, and looked to Harry for support, but Harry had disappeared. Of the crowd, Harry and Draco were the only two unaccounted for. But Ron didn't have time to worry about Harry. What was he going to do about Hermione? Normal binding spells didn't work as well on those effected by the Thwimbles. Those effected by the Thwimbles were not afraid to use the Unforgivable curses, the everyone realized as Sprout yelled out "Crucio!"

***
Having been pulled away from the group by more than just his father's words, Draco was eager to help them, but even more eager to help them by taking out his dad, "My dear boy, your information about them attacking us the day right after our planned attack would be helpful, if we weren't killing them now." Lucius said, his hand resting on Draco shoulder, "Unfortunately for them, they won't be around to attack us the day after, as a matter of fact, after tonight, there will be no other side, there will be no opposing force. This is the night that blasted Harry Potter dies, tonight that fool Dumbledore falls. Tonight is a good night. I will certainly invite you back, we will let all know that this was just a misunderstanding..."
Draco brushed his father's hand off him, "This is a misunderstanding dad, for sure, you see, you thought I was spying for you, but you were wrong. See, I was just giving you false information, like the fact that they had not upped any security measures here, yeah, totally wrong, and the idea that they were planning on attacking you, no, that was wrong too. You see, I am not on your side."
Lucius' eyes narrowed, "What, boy?"
Draco put up his wand, this was the scariest moment of his life, "I am not on your side." He said, ready to curse his father with all he had.
But his father beat him to it, "Crucio!" Draco's knees buckled and he yelled out in pain, he dropped his wand and tears filled his eyes, "I cannot believe this... my own son..." Lucius said, picking up Draco's wand, "My own son turning on me," He turned to Draco, who was trying to recover, "I am very sorry about this.... Ava Kedava!" And a yellow light hit Draco, he crumbled to the ground.

***

Harry was unsure of how to approach Voldemort, did Alisa know he what he was planning? She seemed to.. She kept Voldemort talking... distracted him enough so Harry could sneak in the bubble she had created around them... He heard their conversation, "Sure, I could be your right hand man- or elf, rather, a father-daughter team, taking on the world," Alisa said, without looking at Harry.
"I'm not a fool," Voldemort said, "I hear your voice more than your words. Do not kid with me, Alisa my sweet, your mother used to play jokes, and look where that landed her..."
"Do not insult my mother, you prick," Alisa said to Voldemort, "If you hadn't raped her, she would still be perfectly sane!"
"Raped? Oh no, my sweet, I don't rape. Your mother was mine, and she wanted to be mine."
"Yeah, she would have wanted it more if you hadn't turned out to be a psycho murderer," Alisa said, "And even when she learned who you really were, she might have forgiven you if you'd given her a chance, and you wouldn't have to like, you know, rape her."
"I DID NOT RAPE KATE!" Voldemort yelled louder than Harry had ever heard, he was surprised no one outside the sound proof bubble heard it, "She was mine."
"Maybe you shouldn't have brought her up," Harry said coming from behind Voldemort, "It seems a rather sensitive subject among you two." Voldemort turned to Harry.
"Mobilicorpus magnus!" Alisa yelled pointing her wand at Voldemort. He fell to his knees as invisible rope cut into his flesh as he pressed against it.
"Finite helom!" Harry said from the other side of Voldemort, and he let out a scream of pain.
"Expelliarmus!" Alisa screamed and grabbed Voldemort's wand, handing it to Harry, "Well done, but think hard before you do what you have to, remember: When he is dead, you are alive, only living people can be killed." Harry nodded to her, not fully understanding, but knowing he would have to kill Voldemort, no matter how long he thought about it, "Stay here, say as many curses as you can think of at him, I must help the others." And she stepped out of the bubble.

***
At this point, only Dumbledore, McGonagall, Ron, Trelawny, and Firenze were still standing, being bombarded by curses which could not get through Dumbledore's protection shield, a glowing light around them. It was a truly dangerous mission for Alisa, being an elf, she could not only see the Thwimbles, but they could attack her because she saw them, fighting them off wasn't something she could do alone, but at that moment, they were all elsewhere. To take care of the people who had been taken by the Thwimbles was simple, she pulled together to elements which had been protecting the castle (unfortunately not the people who were fighting just outside it) and used each element to wrap up each person in a binding spell that could not be lifted without hard work for many months. She was as quick and thorough as she could be, using Dumbledore's help as he caught on, and the many teachers and one student were all bound. And then he released his shield.

***

Draco stood up after a moment, his father had said the curse wrong so that Draco might join his side because of his hate, but all Draco did was give him a look of loathing before taking up his wand, "Avada Kedavra!"

***

"Have they all gone?" Dumbledore asked.
"They have disappeared... I'm not sure where they have gone, or if they will be back. Harry is waiting for you. He is unsure what to do." Alisa said. Dumbledore nodded and went toward Harry, who was still within the bubble.
Ron ran forward to her and hugged her, crying into her shoulder, "You have SO much to explain."
"I always do." She said, hugging him tightly, "Come along," She took his hand, "You should get some rest. You've got a lot to deal with, but it's too late to understand." And she dragged him slowly inside, and rather than bring him to the common room or to the laboratories where his classmates were, she brought him to Gyffindor's secret room and sat him down on the bed, "There are a lot of things about this school that you don't know yet, but you're going to find out. You've got lots of time. And don't panic when you wake up, I'll mark the trail to the exit. Just rest, just rest and you'll be fine." She kissed him passionately, and convinced him to lay down, covering him with the blankets and her cloak she wore everyday except that one, which changed colours to match outfits, with a small rose broach. He fell asleep quickly in the large bed, and she kissed him on the forehead before exiting the room, leaving little enchanted 'exit' markings as she went.