Hey thanks to everyone who reviewed, but keep reviewing please!

Also let me know whether you think that after I've finished this, I should write a sequel or do another, different BtVS/HP crossover. I can't make up my mind, so I need some help!

Chapter 22 - Constant Vigilance

The new year began ant Hogwarts and the students returned to school, after spending Christmas at home. The weather was the coldest it had been so far, and the Scoobies wrapped themselves up in layers to guard themselves against the bitter winds. Harry's newest defence classes began the week classes resumed. He left the Gryffindor Common room on the first Thursday back and headed for the Defence Against the Dark Arts classroom where Moody was waiting for him.

"You know why you're here Potter," Moody growled, "To learn how to hold your own against Voldemort when the time comes." He stood up and pulled out his wand.

"Constant vigilance!" he barked, "That's the key. Never let down your guard." Harry watched Moody warily.

"Get up sonny," Moody growled, "Let's see what you can do so far. I've seen you fight off the imperius curse, and Dumbledore, Lupin and Sirius have got high hopes for you." Without warning he hit Harry with the imperius curse. Harry floated away, hearing a voice gently convincing him to just do a handstand, it couldn't hurt. Harry was aware of lifting his arms before he began to question the voice. Before he knew anything more, he was flat on his face on the classroom floor. Moody helped him up.
"Not bad sonny," he commented, "You fought it off pretty well. But you've got to be better. There's no second chance when you're duelling for your life." He looked at Harry gravely.

"It's tough, but you've got to know." He lifted his wand and once again hit Harry with the curse. This time Harry did not listen to the tiny voice. As it began to sound in his head he firmly thought no. As if a fog had just cleared, his vision was sharp again. Moody blinked.
"Very good!" he growled, "Never seen anyone throw it off that fast myself. Very good indeed." He straightened up, and hit Harry with the jelly legs curse. Harry quickly muttered the counter curse and stopped wobbling.
"Didn't see that one coming, did you boy?" Moody growled, "Remember, Voldemort isn't going to play by the rules. You make sure you don't either. Now lets try a duel.
He and Harry faced each other and took small bows. Quick off the mark, Moody again hit Harry with the jelly legs curse. Harry quickly shot the tarrantellegra curse at Moody, before again muttering the counter curse. He saw Moody lift his wand, and narrowly ducked a stunner spell,
before shooting one of his own at Moody. He narrowly missed, and saw Moody lift his wand again. Harry muttered, "impedimenta" and slowed Moody down, before shooting another stunner at him, this time hitting. He then hurried over to Moody and muttered "enervate." Moody got up carefully.

"Again, not bad sonny," Moody growled, "I was going easy on you, make no bones about that, but you didn't do badly. That'll do for today, next week, I'll be teaching you the unforgivable.

"How to perform them?" Harry said apprehensively.
"Unfortunately yes," Moody answered, "How else are you going to kill Voldemort.

Harry left the room, a mixture of nerves. He was pleased with his lesson, he hadn't done as badly as he'd expected, though he knew that Moody had been holding back, he'd felt it. But the prospect of learning the unf0rgivebale curses, actually having to kill someone, even if it was Voldemort….Harry wasn't sure that It was something he could face. But, he thought dejectedly, he really had no choice, and he had to face it.

After leaving the classroom, Harry thought about going back to the common room, but instead he changed directions and headed down to Hagrid's hut. He knocked on the door loudly, and Fang barked wildly from inside. Hagrid opened the door a crack, then wider when he saw who it was.

"'Arry!" he greeted Harry, "S'good to see yeh." Harry grinned and entered Hagrid's hut, sitting down and allowing Fang to rest his slobbery jowls on his knee.

"Just had my first lesson with Moody," Harry explained, "I didn't really fell like going to the common room."

Hagrid put a kettle full of milk on the fire.

"How's all of that lot going?" Hagrid asked, "A lot of pressure on yeh, but yeh're doin okay aren't yeh?"

"Yeah," Harry sighed tiredly, "It's a lot extra work, but it's okay."

"And yeh're practical defence lessons, they're alrigh'?" Hagrid asked, his voice oddly strained.

"They're okay," Harry said cautiously, "But Hagrid…..?" He left the sentence unfinished, and the question hung in the air. Hagrid sighed heavily and sat down in his giant armchair.

"I don't like vampires," he said bluntly, "An' I know that Buffy, she's the slayer an' all, but she's associatin' with a vampire, an' that jus' as bad as bein' one. My old frien' from Hogwarts was killed by one of them lot."

"But Angel's not a bad vampire," Harry said earnestly, "He's killed people, what vampire hasn't, but he's also got a soul and now is working on making up for what he has done. You should talk to Sirius, he doesn't like him either, but that's got more to do with Angel beings Buffy's ex-boyfriend….."

Hagrid shifted in his seat but didn't look entirely convinced.
"Well, maybe he's don' somethin' but I still don't trust 'im."

Harry got up from his seat.

"I'd better get back," he said apologetically. "I shouldn't really be down here in the first place."

"I'll walk with yeh," Hagrid offered, "Yeh shouldn' be alone in the grounds, it ent safe."