Izuku Midoriya: holder of One For All

It's late at night... The UA dorms are quiet, without so much as a single soul awake in the building. A small flash of light appears, it lingers for a moment before turning red in hue. After a few moments, the glow on the walls disappears as the light vanishes.

Where the source of energy was just moments ago lays a bottle. One that looks like an unbranded bottle of wine, complete with a cork which seals its contents within.

Izuku Midoriya, successor to All Might and current holder of One For All turns in his bed. The sudden light in his room rousing his sleep. He opens his eyes and looks over to his desk, at first seeing nothing, but as his eyes adjust to the dark he starts to see the bottle. "What...?" He sits up, rubbing his eyes before looking back at the bottle again, confirming its not a hallucination.

"Where did that come from?"

Now fully sitting up, Midoriya tries to figure out why there's a bottle sitting on his desk. He looks around for any open door or window where someone might've come in. "Was it Aoyama?" He remembers Aoyama coming to his room at a late hour before, and decides it was most likely him.

Midoriya stands up and heads to the bottle with caution. He picks it up and examines it, noting just how devoid of any markings it is. He shakes it a bit and watches the red contents slosh around. Curious he looks for a way to open the cork, and ultimately decides to just do it with his hands. Activating his quirk, he pinches the cork and pulls, easily popping it out.

The red contents begin to bubble when exposed to the air, and it begins to rise up to the top. "Wait!" Midoriya panics, not wanting to spill the red liquid onto the carpet, he moves the bottle over the trash and lets it overflow. The liquid moving over his fingers as it bubbles over into the trash.

Finally as the contents stop rising and the liquid settles back into the bottle fully, midoriya is left confused. "Is this alcoholic?" He leans in and takes a sniff, but doesn't smell any ****. Instead he's met with an almost metallic smell.

"What did Aoyama give me?" He asks himself. His hands are becoming stained red as the liquid dries, so he sets the bottle down on the table. Walking away from the desk he leaves the dorm to go wash his hands. In the hall, Midoriya grows a bit impatient to clean his hands and casually lifts his hand up to lick the contents off. He figures Aoyama wouldn't bring him something alcoholic, so it should he safe.

He licks the liquid off his hand, cleaning it a bit before reaching a sink, and also getting a taste of what was in the bottle. He notes that it's incredibly sweet, but also has a bit of a metallic taste to it. His first instinct is that it tastes bad, but almost immediately grows accustomed to it, and decides he likes the taste.

Midoriya reaches a sink and washes his hands, using considerable effort to remove the red staining them. After a few minutes, he is able to remove most of it, and decides to head back to his room. On the way back, he subconsciously licks his lips, tasting the remnants of the drink.

He reaches his room once again and shuts the door, his eyes moving to the bottle. "I guess it tasted fine... Maybe a little could be okay." Midoriya grabs the bottle, and without a cup in his room, decides to just take a sip from it. He touches it to his lips and tilts it up, letting what he assumes to be some kind of fruit juice to flow into his mouth and down his throat. After a couple swallows he moves the bottle away from his face and sets it down, resting the cork on top. "That's actually pretty good, thanks Aoyama!" He thinks to himself before turning back to his bed.

Just as he turns around, the tiny amount of liquid from earlier combined with the vastly greater amount he just ingested begin to turn in his stomach. He feels a warm sensation begin to spread within him as his strength quickly leaves his body. He doesn't think much of it as his tired and delirious mind is more focused on going back to sleep. He quickly collapses on his bed and closes his eyes, though he doesn't fall asleep right away...

Instead of sleeping, his body absorbs the tainted drink into it's system, letting it work on his insides. Midoriya reaches for his stomach weakly, holding it lightly. He groans slightly, feeling a small amount of pain... wait... not pain... it actually feels kinda nice? His strength suddenly returns to him, and his eyes shoot open as the liquid triggers something within him. His body grows stiff as a peculiar feeling washes over him.

Along with his returning strength comes an increased physique. His already toned body grows larger, his muscles gaining mass out of thin air. The color in his skin seems to fade and grow pale, while his nails seem to grow hard and dark. He can feel something inside him shift as his vision in the dark improves, his pupils become slits as the irises around them gain a red hue. Midoriya pants and strains his jaw as his canines elongate into small points. His ears too follow suit and grow longer, giving them a slight elvish appearance.

Along with the transformation to his physical appearance. Midoriya finds his mind altered as well. Small subconscious changes have wormed their way into his head, changes that are sure to show themselves from now on...