In the room, Evan opened a thick magic book, he turned to the Animagus page, it showed every step one must take.
After confirming everything, he took a deep breath and picked up the potion and drank it.
It was like a cup of strong liquor, dark gold syrup flowed down his throat, a powerful mana began to appear from his body, it grew stronger and stronger.
The Mana was like a surging river, it constantly gushed out of his body.
He breathed in; he could feel his body change.
His body was full of restless mana, the mana began to overflow from him uncontrollably. It gave Evan the impression that he was capable of anything.
But the feeling was very short, he felt his body had reached its limit, the mana within his body felt very uncomfortable. He needed to use this mana on something or he feared he might die.
"Animagus!" said Evan as he drunk another potion.
His body began to change as soon as his voice fell.
Powerful mana filled the room in an instant, under the impact of the mana, everything in the room was scattered.
Even the things that were kept outside the room where affected by the mana. Dobby quietly opened a small gap in the door, he was too terrified to go inside, his hands were holding the door handle firmly, two gigantic eyes were staring inside and looking at Evan.
In the centre of the room, Evan's muscles were cracking. It was as if he was a slime, his whole body was morphing.
When he used the Polyjuice potion last year, Evan felt like his skin, blood, and bones were melting.
But the feeling was much stronger compared to the Polyjuice potion, the intense pain almost made him faint. Evan bite his lip, he told himself 'he must insist, if I faint now, I fail, then everything I have done will be for naught.'
He concentrated and tried to control the spell.
In his insistence, his body shrunk, it began to change to an animal.
His bones morphed, black fur appeared on the surface of his skin and a pair of big furry ears grew on his head.
After about twenty minutes, there was a new shadow in Evan's bedroom.
The restless mana gradually calmed down; the effect of the potion gradually faded. Evan knew he was successful, he shook his head, his hands now had claws and everything in the room had become gigantic to him.
Although it isn't clear what the animal was the size was certainly small.
Evan remembered what the book said about Animagi: Animagus transformations are usually limited to non-magical creatures, this is because the wizard's mana and magical creature's mana have a subtle but essential difference, if you become something such as a Phoenix, Dragon, etc, it will have unpredictable consequences.
In addition, Animagi cannot change into any random animal, the transformation is based on one's character and weight.
Evan's body was smaller so he turned into a smaller animal.
The key is personality, he is more cautious so he thinks he turned into an animal that is more cautious.
"A small, non-magical creature with a cautious personality...God, am I a mouse like Peter Pettigrew!" Evan's heart sank, that would be the worst result.
He wanted to become a bird the most, it was the most convenient, but given his strong fear of heights, this possibility is not likely. But as long as he is not a mouse any other animal is ok. Because he came from China before crossing over, he thought he might become a panda!
But based on his size, a panda is not possible, "maybe..."
When Evan was thinking, the house elf entered the room while trembling, he looked at Evan in horror and cautiously approached.
"Oh, my God, sir has turned into a black cat!"
"What, I became a black cat?" Evan sighed in relief knowing he hadn't become a rat.
A black cat was an unexpected result.
In the wizarding world, it has been a symbol of expelling evil spirits since ancient times and it has great significance. Black cats are widely believed to have strong mana, Evan has looked through all the records of Animagi in the last millennium but no witch or wizard has turned into a black cat.
"Mr. Evan Masson's magic has run amok," said Dobby. "Stupid, useless, you could have done something," screamed Dobby loudly while pulling his ears.
"Stop, Dobby, my situation is excellent, you don't have to do anything, don't punish yourself," said Evan hastily, but no words came out, only a meow.
"Dobby knows, Mr. Evan Masson must go to St Mungo's Hospital for Magical Maladies and Injuries! Dobby must save Evan Masson"
Hearing Dobby wants to save him made him think of last year when he wanted to save Harry, he didn't want to die at the hands of a house elf.
He cannot change back to his original form for now but he saw the other wasn't going to wait for him to change back naturally.
Evan jumped to the side to dodge Dobby.
'Damn what can a black cat do besides be cute?!' thought Evan
With the reflexes of a cat, Evan is very agile, he dodged Dobby a few times but he saw that the other was about to use magic, he knows if Dobby does, he won't be able to escape.
Evan suddenly jumped on the balcony through the open window.
This feeling is wonderful, Evan is like a real cat, he then smoothly jumps down to the first-floor's windowsill, he is not hurt one bit.
Seeing that the other is following him, Evan did not delay one bit, he ran and after going around a corner, he hid behind a garbage can.
After a few seconds, he saw a large teary eye house elf running along the street.
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Evan watched the house elf disappear from his sight, it seems a cat is not completely useless, at least its hiding ability is excellent.
Almost all Animagi are hiding masters, look at Peter Pettigrew, he has hidden in the Weasley's home for twelve years, you have to at least admire that.
Evan suddenly heard a loud noise coming from the trash can behind him, something was coming out of it.
He hastily jumped back a couple steps, if it is a stray cat what should he do.
But what came out of the garbage can was much worse than a stray cat.
Evan saw a black dog emerge, it looked at Evan with its two eyes.
In the dimly lit alley, a black cat and a black dog were looking at each other. The two sides looked at each other for about three seconds each side showed an extremely human look on their face.
Evan realized immediately that the other side was not a stray dog but Sirius Black.
His luck is really good, he hides behind a trash can and out pops Sirius Black who the Ministry of Magic hasn't even been able to find.
Just like Evan realized who he was, Sirius Black immediately realized that the black cat was an Animagus, he gave Evan a ferocious look and growled twice.
The atmosphere was tense, Evan felt a hint of danger.
His muscles were tense before he could even react, Sirius ran away.
The other side escaped, Evan froze for a moment, he realized what just happened, he soon chased after him.
A cat was chasing a dog in a dimly lit alley in London, what would other people think if they saw this strange scene.
The two people were fast, much faster than ordinary cats and dogs.
Evan's black cat form was powerful he only needed to lightly push on the ground before he leapt over a meter, he quickly shortened the distance between him and Sirius Black.
Sirius Blacks endurance was better than Evan's but twelve years in prison and one month of hiding will take a toll on someone.
Evan had a wry smile; he forced the other one into a dead end.
Sirius Black cautiously stepped back, he had nowhere to retreat to, he bared his teeth, his growl grew louder, he stared at Evan. He paused for a while before he made up his mind and rushed toward Evan.
Not anticipating that the other party would suddenly dash toward him, Evan jumped back a meter.
He suddenly realized that he did something stupid, why did he chase Sirius Black.
He wants to talk to the other in human form, maybe make a plan to catch Peter Pettigrew and let this year's events resolve smoothly.
But he doesn't have any mana left, he can't transform back into a human within a short time, seeing that Sirius Black kept getting closer and closer made Evan constantly step back.
The atmosphere became tenser, Evan weakly meowed, Black's footsteps did not falter but became more vicious.
He was unable to communicate with him so Evan decided to turn and flee.
He could feel Sirius Black chase him so Evan had to speed up. When he turned and ran through a garden, he saw a figure holding a huge box on the dimly lit corner.
Evan was surprised when he came closer, he realized who it was.
Harry was unable to stand, he was trembling all over, he just made Marge Dursley inflate like a balloon but she shouldn't have insulted his parents.
He knew from his friend Evan that his parents died fighting Voldemort. He was so proud of his parents, they died protecting him. So, he doesn't regret using magic on her.
He took his things, walked a few blocks, and now he is in the dark Muggle world with nowhere else to go.
Worst of all he had just used magic which meant he was almost certain that he will be expelled from Hogwarts. He knew he had severely undermined the law that restricts the use of magic by minors so the Ministry's response failed to surprise him.
What should he do now, he asked Hedwig to send a letter to Evan maybe he should go to the others home since it's near here? But Harry hesitated immediately, he didn't want to get in trouble with Evan since he was almost certain he will be expelled.
Harry looked down at his wand in his hand and if he was destined to be expelled then a little magic wouldn't hurt. His suitcase had his father's invisibility cloak, if he cast magic on the suitcase to make it lighter and then strap the suitcase on his broom, he could cover himself with the cloak and fly to London to take out all his money from Gringotts Wizarding Bank.
Then he can go exploring!
The idea was terrible but he couldn't sit on the curb all the time or he would have to explain to the Muggle police why he was on the street at midnight with a suitcase full of spell books and a broom.
After about a minute Harry made up his mind, he opened his suitcase and looked for the invisibility cloak.
He suddenly felt someone or something was approaching him.
"Lumos" whispered Harry, a small pale white light was produced by the end of his wand.
In the next second, he saw a small, pure black kitten rush at him, it then jumped into his arms.