Okay, I actually like the way you rhymed this. (I usually don't like rhymes, but this was awesome.) I only had a few minor problems.

a) In the fourth stanza, it reads: The Dark Lord's magic had come undone / In attempts to kill the Potter's only son. I think you can cut the word only here. It makes the second line have two more syllables than the first, so it sounds rougher.

b)The fourth stanza also says: Upon his brow appeared a scar. Just before you were talking about Voldemort - so even thought I knew Harry's the one with the scar, this confused me for a moment and I was like Wait - Voldy has a scar, too?

Otherwise, this was great - I love it! It conveys the meaning of the beginning of the Philosopher's Stone perfectly. Keep going!

(Are you going to do the other books, too?)

~Tyger, tyger, burning bright - Euphrates