Disclaimer: I do not own or have any rights to Harry Potter.

I hope you enjoy this story that I got from katie13 (yes another one) that she said that she had never put up on this site.

Chapter 37

Sirius closed his eyes, concentrated, and with a 'pop', he changed into a unicorn. Sirius opened his eyes and enjoyed his godson's stunned expression. He allowed Harry to stare for a minute, and then he changed back into his human form.

Harry was gaping at him: "Wow, Sirius - how did you do that? I thought your Animagus form was a dog!"

Sirius grinned: "I have two animagus forms. I don't use the unicorn because I have no need too."

"If you can change into a unicorn- why don't you tell Dumbledore?"

Sirius could not help it. He threw his head back and laughed.

"Firstly, Harry, I don't tell Dumbledore everything. God, no! If Dumbledore knew everything the Marauders ever did, he'd have to expel us in hindsight! And secondly, you are the only person, other than myself, who knows. I never even told James."

Harry nodded, a little astonished and proud that Sirius trusted him that much. However, Sirius' little demonstration had helped him reach a decision.

"If I use the unicorn form, would you help me with it?"

Sirius' grin widened and he ruffled Harry's hair: "Kiddo, this is why I told you about the second form."

Harry smiled softly: "Alright, and Sirius, thanks for telling me. It means a lot. But-"

Harry suddenly frowned.

"If you used the Animagus Potion, the other Marauders must have seen that you have two Animagus forms!"

Sirius nodded.

"Good point. But, Harry, we did not use the Animagus potion. It is a very recent invention which makes becoming an Animagus much less dangerous and difficult. In fact, I think you could try to change again right now. Just concentrate on the sensation you felt when you changed into the unicorn, and on the feeling you had when you were in that form, and you'll be fine."

Harry nodded, closed his eyes and concentrated deeply. He tried to remember exactly what being a unicorn had felt like….. And then, there was a sudden 'pop', and he was in his animal form.

Sirius cheered and clapped beside him, before changing into a unicorn himself. He nudged Harry, urging him to turn around. Harry smiled inwardly. Sirius had conjured a huge mirror.

There was little difference between his and Sirius' unicorn form. They were both pure white, though Sirius was quite a bit taller than Harry. Sirius had a small, blue line in his mane, while Harry had a golden line on his forehead, shaped like lightning.

Harry snorted and tried to walk away from the mirror, but found that being a four-legged animal was not as easy as it looked. He stumbled over his own legs and almost fell down. Sirius suppressed a smile and quickly ran over to Harry's side, teaching him how to walk.

Not much later, they were running through some woods near the house, until they reached a lake.

Sirius shook his head and changed back into his human form. Reluctantly, Harry followed suit.

"So, Kiddo, how do you like being an Animagus so far?" Sirius asked with a grin. Harry threw his arms around his godfather.

"Oh Sirius, thank you so much, this is so great!!!" At the same time, he couldn't quite suppress a yawn.

Sirius did not miss that: "Wonderful, Harry, but I think we should head back home now, you look tired."

Harry sighed, he knew arguing would get him nowhere, so he just nodded. Besides, he was feeling tired…..

Both of them changed back into their Animagus forms and went back to the house at a more civilized pace. Sirius made Harry eat some lunch, and then he sent him off to bed to take a nap.

Albus,

In your last letter you told me that Lily and James are now at Hogwarts. I did not want Harry to see them yet, because he was only five years old. But something unexpected happened today; Harry changed back into his fourteen-year-old self. Therefore, I think it would be a good idea if Lily and James came to our house soon, I do want to see them again, and I will tell Harry.

Sirius.

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