The heroes and villains gain new powers from other dimensions
After the events of the USJ, class 1A were having a class with All Might, Midnight and a still recovering Aizawa, when all of a sudden a dimensional breach opened up above them, allowing a cluster of crystals infused with strange otherworldly energy to fall out from it and into the ground near the group.
Causing the energy built up in the Krystal’s to burst out and engulf the group in it, mutating and changing them at the cellular level, healing them all of any and all injuries they had as well as giving them new powers.
Initially afterwards the crystals seemed useless, however Nezu had them placed in a vault underneath UA to be studied, leading to the accidental discovery that after a short period of time or after making contact with the right power source the crystals would regain their energy and give those who already haven’t come in contact with them powers.
After getting he gained his own new powers Nezu realises how truly dangerous these crystals are, and decided that they needed to be sent somewhere where no villain could get there hands on them, but also were they could be studied further.
However as they were being ready’d for transport to i island, they were attacked by several groups of villains wanting them for themselves, although they were able to protect the main cluster a small handful were grabbed by a agent of All For One, leading to the league aging access to some for their selves.
All Might has basically become a Kryptonian however although the area his wound was is completely healed, it is very tender and it hit can cause a lot of pain, sort of like his own achilles heel.
Midnights powerd has merged with the powers of the smoke Smoke fruit.
Aizawa has gained the powers of the scarlet spider.
Nezu the powers of x men mutant Sage, increasing his intelligence tenfold as well as gaining her other minor abilities.
Present Mic to gain the powers of Echo Echo.
Vlad King’s powers to be improved by the powers of Michael Asher.
Endevour to gain the powers of the red Hulk.
MT lady to gain the power of way big.
Kamui Woods to gain the powers of ultimate swampfire.
Beast Jeanist gains the powers of the x men mutant Skein.
Tiger gains the powers of mr fantastic himself.
Hawks gains the powers of archangel.
While Miruko becomes a hybrid saiyan.
Aoyama’s quirk has merged with cyclops powers making his beams stronger while giving him the ability to shoot them from his eyes, same downside as cyclops though.
Mina has gained the powers of a Xenomorph, giving her sharp claws, tail and teeth, along with senses and acid spit, as well as making her acid stronger if she needs it while making her completely immune to it.
Tsuyu has gained the abilities of Greninja, adding the Pokémon’s abilities to her own.
Tenya has gained the powers of sonic the hedgehog, giving him the blue blurs speed and hedgehog like mutations, such as spiky quill like hair, dorsal spikes, tail and sonic like ears.
Ochako quirk has been improved by the power of ultimate gravattack, also giving her the three little planet like minions that float around, which she calls Venus, Mars and Pluto, and two rocky horns on her head.
Ojiro has gained the powers of tails, giving him an additional tail while also making them fox like giving him the ability to fly with them, and giving him ears similar to the kid geniuses.
Kaminari quirk has been exponentially improved by the powers of feed back, making him completely immune to his electricity, giving him the plug like tail and head tendrils, and the metal finger tips.
Kirasima’s quirk has been improved by the powers of diamondhead, now when he hardens his body becomes the blue crystal of diamondhead, as well as all the aliens over abilities.
Koda has gained the powers of beast boy, now not only can he talk to animals but now he can turn into them.
Sato has gained the powers or Armadrillo, giving him the aliens strength, durability, hydraulic arms, tail and earth shaking powers.
Shoji has gained the powers of four arms, giving him the juggernaut’s incredible strength and durability, while also making him bigger, an additional pair of eyes and red skin.
Jiro’s quirk has been greatly improved by the powers of beast of ultimate echo echo, giving her the ability to fly, highly resistant blue metallic skin, super sonic scream and each disk, as well as making her jacks stronger while giving her two more from her back.
Sero has gained the powers of Miles Morales spider man, and you all should know why.
Tokoyami’s dark shadow has been improved by the powers of venom, but luckily the sentient quirk doesn’t need to worry about the aliens unique dietary requirements due to it being make out of shadowy energy instead of organic matter.
Shoto’s quirk has been greatly improved by both the powers of iceman and Heatblast.
Toru’s quirk has been improved greatly by the powers of the invisible woman, giving her the heroine’s powers and allowing her to become visible and invisible at will.
Katsuki has become half viltrumite, due to the aliens dominating DNA his hair had become mostly black with the tips becoming orange then yellow at the end very end.
Izuku had become half saiyan, gaining the species abilities and natural connection with Kei and fighting instincts.
Mineta quirk has been improved by the powers of Ballweevil’s, giving the spheres on his head the same properties as the gooey balls the aliens can create, while also giving him the ability to spite out more from his mouth.
Momo’s quirk has been improved by the powers of the Symbiot Scron, making her quirk sentient and more powerful, like with Tokoyami she doesn’t need to worry about the aliens unique dietary requirements due to her quirk being fuelled by her lipids.
All For One gained the powers of parasite, giving him the energy draining powers of the villain, allowing him to weaken his enemies and use their energy to empower himself and his quirks to new levels. This also restored his body, however his eyes are now more sensitive to light and his face is now a much bigger weakness.
When Kurogiri… Oboro immediately gained his powers, he subconsciously used the powrs of the Nightcrawler to escape the villains reach, making it clear to All For One and Garaki that they needed to be careful on using their energy crystals on any nomu.
Spinner gained the powers of humungousaur, making him as big as muscular, while also giving him super strength, the ability to grow even larger and the ability to generate shockwaves from his tail.
Toga would gain a symbiote with all the powers of Toxin, giving her a new friend that loves blood just as much as her, can give her any outfit she needs and a bunch of other cool powers.
Mange’s quirk is improved much more by the powers of the Jiki Jiki no mi, making her much more deadly as a combative.
Mustard no longer has to worry about his gas effecting him, as now with the powers of Vapor, he is the gas now.
Like his little brother Dabi has gained the powers of heartblast, making him completely immune to his fire, but also making it stronger and more versatile, along with the bonus of his body being restored he’s very pleased.
Muscular has gained the powers of sabertooth, making him far more dangerous from before and making his a true predator.
Garaki not going to be left out, gained the powers of the brain brain fruit, making him far more intelligent and more curious of other fields of research.
And then there was Shigaraki, who gained the powers of an Osmosis, a power that would work incredibly well with AFO when he gained it.