All For One let the hero make the first move. He was curious how the addition to All Might's quirk would affect the result he had foreseen (or failed to).
All Might rushed into armlength of All For One before delivering a right hook to the chin. The villain took it squarely in the face after removing the following shockwave that would crumble his suit. Unflinching from the impact, All For One ripped apart the space where the torso of All Might had been but the hero kicked off the villain to create distance.
"Delaware Smash!"
Unamused with how a harder punch could have a dedicated name, All For One wondered where the link between the name and the punch had come from. Strengthen his muscles in the arms, he intercepted the punch by punching it from the side, redirecting the blow to the environment. With the momentum from the deflect, All For One elbow-chop All Might's left eye but the hero had turned his head skyward to miss the blinding blow by hair width. Seeing his attack had missed, All For One controlled the air between the two to create distance via a pressure explosion.
In that little moment, he asked.
"I'm curious, All Might. What makes you so confident that you can defeat me? Is it the memory of beating me once before?"
What answered All For One's question was a reeled in punch. The pressure drop pulled All For One into range before All Might launched an uppercut. All For One utilized the immense force to fly away, creating a decoy to trick All Might before teleporting a distance away to scry the flows of the energy responsible for quirks. The isolated space limited the number of configurations of energy so the search was easier on the brain. Moreover, the entertainment from All Might searching for an afterimage made everything much more enjoyable.
That would have been true if not for All Might cannonballing toward him and dropkicked All For One to the sea below.
'This speed? How? Either his strength is boosted by that addition in quirk factor or he can see through my decoy. A replay is needed.'
Dodging the shockwave booms from hero's punches, All For One analyzed the moment. The recollection quirk reeved up, replaying the scene with the focus being All Might's eyes. The pupils briefly trailed the trajectory of the afterimage then switched to the location of All For One.
'Perception, but how? I have blended in the environment, eliminate smells and any possible clues of me being there. So what is he seeing?'
All For One clawed at the space below and opened a portal. He slipped through, deployed a physical wall made from composite quirk material, and closed the portal when All Might's hand was half way through. To the man's surprise, the portal was unable to slice the muscle off and now allowed for All Might to grab the villain's body. The fingers pierced through the reinforced muscles before gripping into the flesh, pulling the villain through the small portal. All For One's face showed a painful expression seeing his beloved suit destroyed.
Utilizing the lack of sight between the two, All For One partially modified his body into a plastic blob except the region being touched. The portal was maintained and both sides ready for each other attack. All Might's sense picked up an ominous signal so he readied himself. Reeling back and jabbing into the expected location of the enemy's head, All Might hit nothing but air. The slimy material danced across his skin before manifesting an arm in front of All Might's face.
"Black Day", said the newly-grown mouth on the palm of the hand.
All Might was covered in black light before being thrown far away. The very space bended and pressed together, creating a black hole under All For One's control. Yet All Might was still alive and seeing how his body was not hurt any one bit by the manipulation, All For One was certain what had been added to All Might's quirk:
"Divinity."
'But not there yet. The feeling I have when facing him is not as strong as the others. How long has it been since I last saw someone with this? But even with how artificial the divinity is, there is a base for that to grow.'
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"David, how is it with All Might? Has he agreed?", asked Nezu perfunctory while making his 10th cup of tea of the day and one additional one.
Even with the packed schedule the rat had been dealing with, spending some time for self-enjoyment worked wonder on frayed minds. David Shield, who was supposed to make his speech for MIT that day, accepted a cup. The smell of jasmine tea filled the principal office of UA. In the back of the rooms were monitor screens keeping tabs on every training facilities and housing accommodations inside UA perimeter.
"With some doubt, but he did. How sure are we that it would work out for him? I know he has the foundation of faith people around the world build below the number one hero. But his body and soul? I am not sure."
"I never care for this theory crafting of the soul but I can provide some speculations. How you define a self is all up to interpretation but for me, the self is an amalgamation of born nature and memories, how that born nature experience events."
"Self ... self ... memories ... One For All is a quirk passed from one person to the next... that leaves something different in the self of All Might. Something that strengthen it. So ... memories of the previous wielders? But about the power, if every one of them is as powerful as All Might, their records..."
"That is my hypothesis. I have no speculations for how the power is transmitted but I'm certain that memories, or part of memories, of previous owners of One For All is inside All Might. He has no recollection of how the fight with All For One ends and no demands to know the result, which is abnormal."
"Memory manipulation, seamless work but maybe All Might was not affected? But this is All For One we are talking about so it should be something with his quirk providing resistance against high-level mental manipulation. He already has a steadfast nature to combat that. So with your theory, All Might's sense of self is a mix of various people and this in turns make it difficult to affect him mentally. But what about him, Endeavor?"
"He has a sense of faith in himself and his professionalism to the point of excessive. But the violent streak destroys any good will I have for him, especially in terms of family matters. But I'm not the one choosing who would step into the machine so the only thing I can do is to hold the man up to the standard of a hero."
"Same opinion ... All Might will not be All Might again. He agreed to that but this world need one to be the guiding light."
"And that's why hero counseling and hero education is being the forefront in various places. I hate the idea of a single sun, how about thousands of stars? And that's why the HSPC has to make do with UA existence. They hate having someone above their so powerful control but they see the need to build another pillar. "
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"It seems you have some personal vendetta against that flying one. Take it your way. I will clear a path for you."
"Yes, Master."
Spoke the voice from within the sliced up mansion. Beneath the man's feet was a mountain of charred bodies. His staff heavy with 5 rings of light making a simple swing strong enough to split the coming tide of monsters apart. The corpses were now acting as bait to draw in more and more participants in the massacre.
As more and more crowed the area around the mansion, the man could pin point something with different style compared to the brutish appearance of the monsters. Clad in humanoid white skeletal armor, it set sight on the man before disappearing behind a larger monster.
Relocating the rings to his feet and torso, he dashed toward the one his sense was telling him to be the commander. Cracks followed the trajectory of the staff as the blunt attack obliterated the giant but it was blocked by the shoulder armor of the opponent. The piece shattered and sent the owner sideway but the momentum was cut due to the four tentacles in the back gripping the ground. Using the elastic nature of the muscle fibers making up the tentacles, the thing rebounded and tried for a decapitation but failed due to the staff getting in the way of the sweep.
The man had abandoned the staff to duck down and to punch at the point with the most vitality from the enemy in his perspective, the pulsating mass beneath where a human heart should have been. The counter-blow met the coming punch, ripping the air apart and cleared everything nearby with an explosion. The opponent in front of the man had been defeated but he doubted that was the end of things. Soon enough, more and more enemies with similar appearance appeared, trying to gang up the man. He noticed that the other weaker monsters had disappeared so that meant the resource was spent to deal with him.
He had always wanted something to test his power after so long.
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"I am sending you back. You have learnt the basis of the Mang technique I'm using. Keep your mind clear and your aim unwavering. I have prepared a train to go back to your city, Musutafu. About the one who bring you the deal ... she has gone missing. You can try to track her."
"Thank you."
Jia Qiu did not share the entire truth at that moment because then he would have to discuss the Hand to the boy. The main criminal association with five factions mainly operating in China whose power could rival the old Dark Triad, it had set sight to the girl. She was being hunted by them for some business conflict but he was not afraid for her life. She was someone who could block a strike that would obliterate a 3-story building with a kick. But his disciple could help later on when he was stronger.
"Tomiya, take him to the station and return quickly. There is going to be a party for my daughter. Buy some flowers on the way since she wants to keep the flower in the greenhouse there for other occasions."
"Yes, Master."