Chapter Text
As Izuku lands, he tightens the cape to keep Eri close. The raid just went straight out the window with Nighteye injured and Mirio losing his quirk. He is honestly just running on his instincts at this point and trying to ignore the pounding in his head.
A giant monstrosity bursts out of the ground and Izuku sees Overhaul at the center. He growls and activates Full Cowling ready to fight to protect the little girl who is clinging to him shaking in absolute fear. Taking a step he rushes forward and kicking Overhaul into the sky and jumps after him delivering a quick punch.
“Don’t you-” Overhaul tries to say something but Izuku doesn’t care and hits him again.
Down at the ground, Uraraka and Tsuyu have gotten Nighteye there and watch the fight in awe but notice something that doesn’t look right, “Why is there steam coming off of Deku-Kun?”
Another hit to the madman and Izuku just keeps getting angrier ‘Why won’t he just stay down!?’
As Izuku continues to hit Overhaul more steam continues to come off of him until a burst of it covers both Overhaul, Izuku, and Eri until the trio sees the little girl falling from the sky still holding onto the cape as though it were a lifeline. Tsuyu quickly jumps and grabs the little girl and as she comes down she sees the cape ‘Did Overhaul manage to grab it?’ near the knot it was torn.
As they look up they see a giant shadow begin to exit the cloud. Overhaul plummets to the ground and another blur rusher after him with steam coming from it. Another hit and the blur seems to grow bigger but then another explosion of steam appears as Overhaul hits the ground.
He gets onto his monstrous feet and tries to move and grab Eri when a large blur hits him away. A large stomp was heard as a growl escapes whatever is in the cloud.
Suddenly, a large gust comes from within the cloud and blows away the steam revealing the creature that stands where Izuku should be.
Towering even over Overhaul in his monstrous form stood a green-scaled dragon. Spikes trailing down the back ending in a spear-like tail the muscles rippling with scarred flesh. Upon the head adorned five sets of horns the slit eyes a vibrant green. Another growl escapes the beast’s throat showing the maw of razor-sharp teeth before it bellows a monstrous roar that shattered the windows leaving those closest to it to cover their ears and alerting those that are currently underground.
Taking a charge the dragon headbutts Overhaul back into the air and with a mighty push of its wings follows when green lightning flows over the creature in some areas taking shape of the scars.
“DEKU-KUN!?!?”
Izuku in his new form punches Overhaul with his paw before quickly headbutting the Yakuza leader again. As he goes further in the air smoke begins to leave Izuku’s mouth before he breathes out a torrent of fire straight at his enemy.
As Overhaul screams in pain Izuku hits him one more time and forces him to crash once more into the ground where he disconnects from the ally he combined with.
Trying to get up Overhaul reaches for his gun hoping maybe he can salvage this situation when the dragon lands in front of him. The other heroes coming out from underground stop and gape at the sight before them of a towering dragon leaning its giant horned head to growl at their main target of the raid who is shivering in utter fear.
Overhaul begins to raise the gun with the quirk erasing bullets loaded inside when black tendrils burst out between the scales of the dragon and grabs his hand while new tendrils grab the gun and the other cartridge of bullets. Raising his free hand he tries to bring down on the face of the dragon when another tendril stabs through the palm of his hand spins rapidly creating a hole in his hand. His once captive arm is let go but before he can try and heal himself his hand is stabbed again and the process is repeated.
Multiple tendrils take the gun and bullets, and cover them into a sphere and begin to squeeze breaking everything throwing the ruined weapon into the sky and Izuku breathes another torrent of searing flames completely destroying the dangerous weapons. As he takes a breath, a third explosion of steam escapes from him and there he stands human again at least somewhat. Before anyone can ask questions, the green-haired boy falls to the ground unconscious.
~A couple of hours later~
At the hospital, Aizawa, Toshinori, and Inko stand in a hospital room.
“I thought his quirk was super-strength not turning into a god damn dragon!” Aizawa suddenly screams out frustrated since none of this makes sense.
“Aizawa, I don’t understand this either, but there is no need to lash out. Ms. Midoriya can you explain the quirk of young Midoriya’s father please?” Yagi decides to try and get to the root of this conundrum they are currently experiencing.
“T-this wasn’t what was on-n the donor’s-s inform-”
“Wait, donor?”
“O-oh um, my husband wasn’t f-f-fertile and well I-I had always really wanted a child so I had gone to a sperm bank and asked for the DNA from someone with a fire quirk so it could be like it was o-our own child but well when Hisashi f-found out what I had done h-he left. T-t-turned out he had cut his tubes a-and never wanted a-a child.” Inko manages to get out through her worry for her son as she looks at him on the bed.
Izuku is now sporting the same amount of horns as his dragon form. Scales litter his body now and x-rays showed that he now has a new organ which they theorize is for the fuel for his fire breathe.
“I’ll have Recovery Girl run a DNA test to see who the sperm donor is so maybe we can get some answers.” with that Aizawa and Toshinori leave the room in the hopes of getting some answers.
~One hour later~
Toshinori and Aizawa sit before Recovery Girl waiting for her to tell them the results.
“Midoriya’s DNA is a bit strange right now but I managed to isolate what I was looking for and for some reason he has four biological parents. I have yet to call the three donors yet as I figured you would like to know who they were. First, we have Ryuko Tatsuma AKA the Dragon Hero Ryukyu so one part is solved on Midoriya’s quirk. Secondly, we have Taishiro Toyomitsu AKA the BMI Hero Fatgum, I have yet to figure out how this factors into his quirk yet. Finally, we have Enji Todoroki AKA the Flame Hero Endeavor which explains the fire breathe.”
The room is currently silent as the two teachers absorb the information they have just been told.