Wrath of a Demon Lord

Demon lord unleashed

Shigaraki: HAHAH fools, Nomu here was made to kill all-might, he has regeneration as well as shock absorption, you can't beat him

Hisashi: 'shit, this is bad, WAIT did he say made'

Hisashi jumped above the Nomu creature as it lunges at him but it then continued towards Aizawa

Hisashi: ERASER

Aizawa was unable to dodge as the beast grab his head and smashed it into the ground

Hisashi was about to respond when out of the corner of his eye, he say Izuku and 3 other people with him. He then ran full speed to wars them only to be elbowed to the ground by the Nomu and dropping his sword

Izuku: DAD

Hisashi: IZUKU STAY B—

He couldn't finish as the Nomu smashed his face into the ground

Izuku: LEAVE HIM ALONE

Izuku ran towards his dad and as Hisashi looked up and saw Izuku going for the sword on the ground. He was about to respond but it was to late as Izuku grabbed the not only did a massive tornado form around him but the front of the USJ exploded to reveal a pissed off All-Might. Hisashi could only look on in horror to see his son's hair grow longer and swap colors. Izuku roared, causing a massive shockwave that knocked everyone back, including the Nomu 

Izuku: HAHAHAHAH AH MAN, being trapped in a kids body for over a decade gives you such a crick in the neck(if anyone gets the reference fell proud)

Tsu: wait trapped for over a decade

Mineta: wasn't that when Izuku was kidnapped

Tetsutetsu: wait WHAT

Izuku turned around and the there students saw one of Izuku's eyes was a light blue and his hair color swapped

All might ran down and grabbed both Aizawa and Hisashi and placed them nested to Izuku but when he got there he noticed his new look and turned to the other students

All-Might: what happened to Izuku

Shigaraki: NOMU KILL ALL MIGHT

The nomu beast charged only for its fist to clash with the sword Izuku had in his hand

Shigaraki: what th—

He was unable to finish as he turned around as saw that his legs were frozen and Kurogiri was being pinned down by a blond hair kid. They looked to see Izuku holding back the bird guy

Izuku: my my, you are strong, this'll be fun

Izuku launch the nomu back and then punched it in the face, only for it to to grab him in the face and slam him into the ground

Everyone: DEKU/IZUKU/MIDORIYA

Shigaraki: HAHAHA take that brat. weren't you listening, he was made to kill all might, you can't hurt him

He and Kurogiri got away from the students but stayed to watch the fight

Hisashi: all might, when they're down, take Izuku down

All might was about to respond back when Izuku screamed

Izuku: DRAGON PULSE

everyone saw Izuku shoot a rainbow beam from his mouth that sent the nomu creature flying and landing several feet away from him

Hisashi: that's Milim, she's controlling Izuku 

Everyone looked over to see their classmate charge at the nomu with incredible speed and then uppercut it in the chest as it went flying