Kirishima's POV
Midoriya was actually writhing around, clutching his glove as if in pain.
"He's grown even more? That jerk," scoffed Monoma. But Midoriya screamed at him "RUN!"
The black tendrils or whatever they were were blasting out of Midoriya's arm like some kind of demented spider or something, Monoma just barely ducking out of the way.
"Shinso!" He shouted.
"Another new move from Midoriya?' Asked Sato.
Shinsou was the nearest to Midoriya, who was becoming visible through a cloud of dust
"Shinsou!"
HE rasped out as the dust cleared away and his arm - flapped around, unnaturally, as if the strange tendrils were controlling it. "Just run! The power - can't control it - It's exploding out of me!"
The thing was whipping up through the surrounding area as Midoriya's teammates and rivals gasped - it was blasting far enough away to hit even them, pulling Midoriya along by the arm.
"Deku!" Gasped Uraraka.
"Stop it, stop it!" He was screaming.
Uraraka jumped from nowhere and wrapped her arms around him, screaming "Deku, you gotta calm down!"
"I can't - stop it!"
"Shinsou!" She shouted. "Brainwash him! You need to stop Deku!"
Shinsou looked a little uncertain, but then shouted "Midoriya!" Pulling off his voice changer and smiling. "Let's fight!"
"OK!" Midoriya responded - and froze. Brainwashed. The quirk receded.
"Deku! Hey, Deku!" Said URaraka, slapping him awake. "Are you okay? Hope I didn't slap you too hard!"
"Uraraka - get back, it's too dangerous!"
"Shinsou's brainwashing helped calm you down. You're fine now, right?"
"Uraraka, you're hurt! Gah, what did I do?"
From behind him, Monoma leaped into action.
"Hm? I'm afraid this match isn't over yet!" And he swiped at Midoriya.
"Monoma!"
"I've got this!" Said Uraraka, using her martial arts moves to run at Monoma - until more resized weapons came flying at our classmates.
"Are you two ok? What was all that?" Said Yang.
"Nice poltergeisting there!" Said Monoma.
"That wild black energy ruined all our plans," said Tsuburaba as he and Kodai ran up, pursued by Ashido and Mineta. "Eat this!" Cried Asdhio, then to our classmates, "Midoriya, URaraka, everything ok?"
"Everyone's here!" Said Uraraka. "It's an all out brawl!"