These people in the blood-red cloaks—people more ruthless and cruel than the Death Eaters—knew one thing: To win the greatest war of the ages, they would have to fight darkness with darkness.

This, strangely enough, was true for both sides—evil and good.
 
 

Listen well, and listen closely,

For the greatest war of all the ages is quickly approaching.

Put me on, but be very afraid,

If you don't consider what I say, it may be too late.
 

When Albus realized that the Slytherins were watching him, he closed the textbooks quickly and surreptitiously shoved them back into his schoolbag. But not only were the Slytherins staring at him—they were talking about him, too.

"Can you believe it? The son of Harry Potter? In Slytherin?"

"Do you think he's a spy?"

"The Sorting Hat must have been hit on the tip with a club. There's no way Potter's anything like us."