For this fight, I'm gonna rip off the fight meliodas had with galand, once his power was restored.
"Oh.... this is going to be fun..."
Izuku was ready for battle, until he was interrupted by a familiar muscular man.
"WAITTTT.... no one lay a hand on him! This is the pray I failed to kill! I will be the one to finish him." As soon as muscular finishes his sentence, Izuku punches him with massive strength, then he proceeds to jump, grab his head, and slam him into the ground. The students are just watching in awe, as the villain with massive amounts of strength was getting beat down from someone they betrayed. In the crater that Izuku creates from the slam, muscular says,
"have you changed since we last met?" Muscular stands up and throws 25 fast punches to where Izuku is. But he is too fast and dodges all of them. At the last punch, muscular keeps his arm out. So Izuku lands on his arm and replies,
"nah, just got a bit more power." Izuku knees muscular in the face, slams his stomach then round house kicks his face. As muscular is struggling to get up, Izuku pinched him in the face. But this one sends him a few meters back. As Izuku slowly walks towards muscular, he manages to stand up, and say
"this is how it should be! Or else things would get boring around here!" Izuku then take lostvayne about an inch out of his holster, then puts it back in. Doing this makes muscular spray blood from multiple gashes that appeared on him. Then he passes out from blood loss. As muscular passes out, the nomus finish healing and rush towards Izuku, Izuku uses escanors power sunshine to to heat himself up drastically, then he makes mini cruel suns and force feeds it to all of them.
"HA! IF YOU THINK THAT THAT WEAK ATTACK IT ENOUGH TO TAKE DOWN MY NOMU THEN YOU ARE DEAD WRONG!" The man-child screams.
"Actually, my suns burn at 7000° degrees Celsius, and I can make them A lot hotter. But this is enough for the cells to burn and die, and thus not being able to regenerate and killing them." Izuku explains. As if on cue, the nomus fall with a blood curdling scream, and proceed to die. Everyone is looking in shock at how powerful their former classmate had become. Shigaraki screams
"AHHHHHHH!!! CHEATER CHEATER CHEATER CHEATER!!! KUROGIRI, GET US OUT OF HERE!" A purple portal opens up and take mist man and man-child away. Izuku then jumps to his classmates and asks if they are okay. To which uraraka responds with
"what do you mean are we okay! Why are you even here traitor!" (Shes a little bit of an ass in case you couldn't tell.) Izuku sighs and uses broadcast to put his memories inside of theirs so that they understand that he is innocent. Everyone but the people who believed his innocence, looked shocked. Izuku then proceeds to use the power of a deity and heals all of them, even all mights injury is healing, and he looks stunned. Izuku says,
"Well, I'm goin to go rest for a bit" he teleports away, leaving everyone looking stunned.
Well that's it, hope y'all enjoyed. And I'll hold a vote for some things next chapter oke?