Harry took out the rolled up socks at the bottom of his trunk, and extracted the tiny gleaming bottle.

The Felix Felicis.

"Well here goes," said Harry, as he raised the little bottle and took a carefully measured gulp.

"What does it feel like?" whispered Hermione, but it was Ron who answered:

"It's a great feeling when you take it, like you can't do anything wrong."

"What are you talking about?" said Hermione, laughing. "You've never taken any!"

Yeah, but I thought I had didn't I" said Ron, as though explaining the obvious. "Same difference really…"

"HARRY!" Hermione shouted, as she ran over to him.

For Harry had started shaking feverishly, going very pale so his scar showed up more than usual.

He collapsed onto the floor, all the time crying out in pain, with wide eyes and his pupils growing larger by the second.

"Ron, get help!" she cried, while trying to grasp the bottle of potion in Harry hand.

As Ron ran off to find a professor, Hermione looked into the bottle. But instead of the yellowy substance she expected to see, she saw a black, smoky liquid.

It wasn't Felix Felicis that Harry had drunk, it was…

"Poison" Hermione whispered, as Harry's skin turned paler, so he looked like a ghost.

Suddenly, the dormitory door burst open, and Ron ran in, with Professor McGonagall, Neville, Ginny, and Crookshanks following.

"What happened Miss Granger? Mr Weasley said Mr Potter had taken a potion, where is it?" Professor McGonagall said briskly, while checking Harry with a grave expression.

"Here" Hermione gave the bottle to Professor McGonagall, who took one look inside it, and gasped.

"Longbottom, run up to the hospital wing and tell Madame Promfrey that Mr Potter has been poisoned, is on his way with me, and is near death." She said, as she conjured a stretcher, and levitated Harry onto it.

She then walked quickly out of the dormitory, with Harry on a stretcher, following.

As soon as she had gone, Ginny burst into tears, and hugged Hermione.

"What are you waiting for? Come on!" Ron shouted, as he sprinted out the door, with the two girls following, off to the Hospital Wing.