Hungarian Horntail!

If Sean doesn't mobilize it, the immense magical power contained within the Obscurus won't be used as his Magic Power Source. However, if he so chooses, the Obscurus's vast magical power will be at his disposal!

The immense magical power surged into Sean's body, slowly accumulating until it reached a certain level, at which point Sean felt a change.

The excruciating pain finally began to subside, Sean felt an indescribable sense of relief. Then, a strange feeling spread throughout his body.

It was as if he had turned into a lump of clay. Sean could no longer feel the flexibility of his body. He saw his bronze and blue Ravenclaw uniform robe begin to melt, and the watch that his parents had given him as a Christmas gift last year began to seep into his skin.

He felt as if he were wriggling, various fabrics and accessories penetrating his skin with a cold touch. After that, a tingling sensation rose, accompanied by a slight pain, and Sean's body began to twist and swell.

Dark scales covered his skin as if slowly emerging from the bottom of the water to the surface of the lake. His slender fingers thickened and hardened, then bent at a powerful angle, his nails turning into sharp claws that gleamed with a cold light.

After Sean swelled to a certain size, his entire body changed. Glossy black scales emerged, a row of sharp barbs appeared on his back, and a thick tail extended out, with jagged bone spurs at the very end.

"Roar——————!" He spread his huge fleshy wings and instinctively let out a deafening dragon roar.

Sean really did turn into a Fire Dragon.

"Roar—" He wanted to say "This feels really strange," but as soon as the thought left his mouth, what came out was still a roar.

Oh right, I can't speak human language anymore... The pure black Fire Dragon scratched its head in a human-like manner.

After the initial Transfiguration, one must remain calm and not let the animal's head take over. However, Sean only felt the joy of a successful Transfiguration and was not panicked at all.

It feels so good to be Fire Dragon... but it's also really strange...

Sean was not used to having an extra pair of wings and a tail, but he could control them freely, just like he had three extra hands.

Most importantly, he is now filled with power; he has become a Magical Creatures!

Sean could feel a magical power flowing through his body that was different from anything he had ever experienced before; the way that magical power operated was completely different from that of a wizard.

"How amazing..." Sean kept exclaiming. He moved his thick dragon legs clumsily and awkwardly, wanting to go to the water's surface to see what he looked like now.

He had only taken two steps when he remembered that he had wings, so why was he walking at all!

Sean took two steps back and then charged forward, unfurling his fleshy wings.

"Roar! (Ouch, what the hell!)" He fell face-first onto the ground, no, he fell face-first into the mud.

The body still needs some time to adapt to the new changes.

However, the Fire Dragon's strong body did not harm Sean. He stood up, shook his huge head covered with slightly twisted spikes, and tried again.

After adapting and trying, Sean finally flapped his wings and took flight.

Fire Dragon's flight cannot be accomplished solely by its wings; this ability to fly relies heavily on its own magical power.

Sean enveloped his wings in magic, and a magical energy appeared in the air to support his weight. He adapted faster and faster, and flew better and better.

After becoming proficient, Sean freely circled the space a few times before landing beside the magic lake.

He spread his wings and saw his full appearance.

It was slightly smaller than an adult Fire Dragon, but a full size larger than the Hebridean Black Dragon that we had seen before. The dragon's body presented a very powerful posture, but its body was also rather slender, giving it a mysterious and handsome appearance.

The Fire Dragon was jet black, even its eyes were black. Its sharp teeth and claws emitted a dangerous cold light, and illusory black particles swirled around the edges of its outstretched black wings.

This is the power of the Obscurus... The Fire Dragon scratched its head, looking a bit silly.

Sean thought he would become the Hebridean Black Dragon, but now he was actually Fire Dragon unlike any other in the Wizarding World.

Something felt off... Sean felt like something was missing from him, like a computer was missing a graphics card; it was an inexplicable biological instinct.

He twisted his long, thin neck to look around, and then saw his wand lying on the ground.

Come to think of it, the core of my wand is the Dragon Heartstring of Fire Dragon dragon...

Sean back to where he was, and then carefully picked up his wand with his claws.

He always felt that the core of his wand was the part he was missing.

As he pondered this, Sean was surprised to find that his wand, like his robe and watch before him, began to merge into his body. It transformed into a fiery red vein and then burrowed into the wrist of Sean's dragon claw.

His body twisted again, a powerful sense of strength and a violent killing intent surging into his heart.

Sean's jet-black body began to turn blackish-green, his vertical pupils turned yellow, the barbs on his head turned bronze, and the bone spikes on his tail became even sharper and more terrifying.

Sean suppressed his instinctive rage and flew back to the lake, where he saw a ferocious Hungarian Horntail reflected in the water.

It can even change... Is it because of the core of my wand?

Sean felt an even stronger power flowing through his body.

Fortunately, Sean easily suppressed the Hungarian Horntail's aggressive instincts.

In his notes, Dumbledore mentioned that during their first Transfiguration, wizards may not be able to distinguish themselves from animals and need to maintain a human way of thinking.

Perhaps because Fire Dragon are inherently intelligent, Sean did not experience any confusion between animals and humans at this moment.

Of course, my current situation is completely different from that of a normal Animagus, and Dumbledore's experience may no longer be useful...

Sean, now transformed into Hungarian Horntail, plopped down on the grass by the lake, his long tail sweeping through the bushes and flowers.

Why is my Animagus so strange...?

Animagus generally cannot transform into Magical Creatures because Magical Creatures operate in a completely different way than wizards, which could lead to unpredictable consequences.

But for Sean, not only his own magic, but also the magic he borrowed from the Obscurus was smoothly transformed into the Fire Dragon's magic and operated without any hindrance.

Sean recalled the strange feeling he had always had; from the beginning, he felt that as he delved deeper into the study of Transfiguration, he would gain something.

Now, is this what it is?

Just like his Dark Arts Talent, he can instinctively judge the power and effect of Dark Arts, and as his proficiency in Dark Arts increases, his spells always produce unpredictable consequences.

For example, there's the Stinging Hex, which is comparable to the Cruciatus Curse, and the Blood Loss Curse, which causes blood to spurt.

Since my Transfiguration Talent is also ten points, does that mean my Animagus is in the form of Magical Creatures...?

Sean thinks this might also be related to his exceptionally high Magical Creature Affinity —he has a natural affinity for these wondrous animals.

However, the current situation is clearly not a bad thing.

Sean looked at his dragon claws. Fire Dragon is much stronger than a lizard, isn't it?

"Meow?" A questioning voice came from the side. Sean turned his head and saw the hesitant Cat-Leopard Pudding.

Different animals cannot communicate through their calls, but their instincts allow Sean to understand what the other animal means.

"Sean? Fire Dragon? Your scent hasn't changed... but you've become much more dangerous..." This was the gist of what the Wampus Cat was conveying.

"Roar—(Pudding, it's me.)" Sean responded with a dragon roar.

"Meow! Meow! (It really is you! Pudding can't understand!)"

Clearly, Animagus was a phenomenon difficult for a Wampus Cat to understand, and Sean tried his best to explain it to him without success. However, for Pudding, as long as Sean still had that familiar scent, that was enough. The kitten (to Sean now, Wampus Cat that stood over two meters tall was indeed a kitten) quickly lost interest in getting to the bottom of things.

It nestled comfortably against Sean's belly, occasionally sharpening its claws with its hard scales.

The Fire Dragon and the Wampus Cat lived in harmony; if Newt saw this, his jaw would probably drop.

Sean played with Pudding for a while, then spread his wings and flew to the top of the cliff.

He doesn't need much magic to maintain his Fire Dragon form, but flying does consume some. Now he wants to try another ability.

That is, the Fire Dragon's signature move - Breath Attack!

"Roar—(cough cough)" Sean cleared his throat with a dragon roar as usual.

A magical force surged through his chest and throat, and a violent, burning sensation coursed through his body.

"Roar!"

When Sean couldn't hold it in any longer, he opened his mouth wide.

A pale blue pillar of fire erupted from his mouth, the intense heat causing the bushes beneath it to spontaneously combust. The pillar struck a massive rock, and when it vanished, a large, spreading red hole appeared on the rock's surface, with dark red liquid bubbling and gurgling in its center.

"The power is considerable..." Sean was somewhat surprised. He hadn't expected that the Breath Attack of his fake Fire Dragon would be so fierce.

However, the very next second that this thought popped into his head, a feeling of weakness washed over him. Sean felt his dragon claws becoming somewhat powerless, and his vision began to spin.

His magic was almost completely depleted, and he, no, the entire dragon, was exhausted from overdraft.