I've heard of something from my friends and the name is Scourge. Who is it or what is it?

Scourge? Oh, yes. Scourge is from Warriors. I think it's from the book, The Darkest Hour. Which is written by Erin Hunter and is mostly sold at Booksamillion. Here's a video with ROCK music. If you don't like rock music, TURN DOWN THE VOLUME IF YOU HAVE IT HIGH! The name of the song is I Will Not Bow. Here it goes.