Invasion Of Two Army's (Mha X Halo Crossover)

The Flood Outbreak

Back at High Charity, Truth was looking through the information on the holographic images of Class 1A sent by Little Joshua.
"Bunny, icy hot, gravity, lightning, turbo, explosive", said Truth.
"(On a holographic image) More details on those special humans hierarchs, they're as strong as The Demon, as soon as our armor powers back up we will continue to aid the Prophet of Regret on....", said Little Joshua.
"No, you and Ashton have done enough, you must return to High Charity to regain full strength, I'll tell you when you can strike these special Demons again, I also have something important to tell you about Regret", said Truth.
"Yes hierarch", said Joshua bowing.
Truth turns off the message.
"These special Demons must be eradicated, they will become a nuisance if we keep them in existence", said Mercy.
"They will be Mercy, nobody can put an end to the Great Journey", said Truth.
Back on Earth, the warthogs we're driving along the beach.
"That bridge is the most direct route to the city center", said Cortana.
"Then we're heading for the bridge", said Master Chief.
"Oh man, I love the beach...", said the marine driver.
"I hope you packed a suit, mate", said Chips Dubbo.
"Cut the chatter...we got trouble", said Cortana.
Covenant Orbital Insertion Pods slam down on the beach all around the everyone, and armed Elites spring out of them.
"Chief, the carrier just launched a wave of pods, they're inbound on your position", said Keyes.
More jackal snipers in Deployable Lookout Towers, elites riding ghosts, and a phantom giving cover fire for them.
Everyone fights through them including Bakugo going nuts over the machine gun.
"YEAH, EAT IT BASTARDS", yelled Bakugo.
"Easy kid, I think you've got 'em", said the second marine driver.
"No there's one left", said Bakugo.
Bakugo shot the remaining damaged ghost and it blew up into pieces.
"Now it's all clear".
Eventually, everyone arrived at a large highway tunnel with an unmanned ghost nearby.
"Oh no there's another", said Tokoyami.
"Wait, that one's empty", said Asui.
"Oh it is", said Tokoyami.
"This tunnel leads up to the bridge, it's full of rats, if you know what I mean... but it sure beats swimming", said Cortana.
"Let's go", said Kirishima.
"Wait", said Bakugo.
Bakugo destroyed the empty ghost.
The second driver looked at him confused.
"What, now none of these shitty covenant can operate it".
"Okay now I understand", said the second driver.
Everyone proceeds to move into the highway tunnel.
"I've been analyzing the covenant tactical chatter, they're surprised, confused... I don't think they expected us to be here, not you and me...all of us...humanity, on Earth", said Cortana.
"Strange", said Master Chief.
"Odd, I know, but it does help explain why they came here in such small numbers", said Cortana.
Throughout the tunnel the whole team encounter many covenant positions consisting of ghosts, plasma turrets, shades, drones, and even a few battlefield methane tanks.
"We have company", said Deku.
Everyone fired their machine turrets and guns.
After passing the group of covenant the scarab blasted into the hole about the tunnel.
"Not that thing again", said Yaoyorozu.
"These guys just don't learn", said the third driver.
"Keep going", said Stacker.
Everyone continues down the tunnel then drives by a group of shadows that fired at them.
Iida was nearly hit and startled him.
"What the hell are those vehicles", yelled Iida.
"Those are shadows, shoot them down as fast as you can", answered Armatenant.
"Yeah I do, they scared me half to death", yelled Iida.
"The Covenant must be trying to regroup. Don't let them", said Cortana.
"Dark Shadow, convert black ops arms", said Tokoyami.
Dark Shadow's arms grew into massive size and crushed one of the shadows with ease.
Chief destroyed another one with the turret.
There was only one left and Deku charged up one for all 20%.
"I better destroy that last vehicle, Delaware Smash, Air Force", yelled Deku.
Deku shot air force from all five of his fingers and destroyed the last shadow.
"Oo-rah", said a marine.
They eventually reached the end of the tunnel.
Back in Japan, Tsukauchi was examining the flood parts.
"This is not like any creature I've ever seen, and you said it came from a space ship", said Tsukauchi.
"Yes, that ship was all purple and covered in that disgusting flesh type substance", said Hawks.
"That must have been a left over phantom that flew here from installation 04", said a voice.
A panther looking soldier from the UNSC walked in.
"Gentlemen, I am Lieutenant Griffin, member of the United Nations Space Command, we are here to inform you that this creature is called a flood, and with their spread this situation is only going to get worse".
"Can you tell us why that ship flew here and is infesting our planet", asked Endeavor.
"It may have not purposely flown here, the flood may have been trying to take over that phantom and must of activate it by accident, but we do know the flood will invade anywhere it lands, they already infested U.A. High and if this infestation is too much to handle, we may have to blow it up or we'll risk losing the planet forever", answered Griffin.
"What", yelled Endeavor.
"That sounds more serious than the Paranormal Liberation Front", said Hawks.
"So far, yes, that's why we're here to help", said Griffin.
"Wait, my son Shoto....is he safe", asked Endeavor.
"All of U.A. escaped unharmed and are in a rescue center, although Class 1A was taken to Cairo station and now half of them is aiding us in the human covenant war, and your son is one of those kids who is fighting another alien race right now", answered Griffin.
Smoke came out of Endeavors nose.
"SHOTOOOOOOOOOOOOOOOOOO, HE'S FIGHTING ANOTHER ALIEN RACE OUTSIDE OF EARTH", yelled Endeavor.
"He's in Africa right now, but this war will take off outside of Earth again pretty soon, and he's a skilled kid he'll be just fine", said Griffin.
"How would you know", asked Endeavor.
"Cairo station managed to keep an eye on them from some help of one of our marines, right now you guys should focus on that outbreak", said Griffin.
Everyone looked outside the window and saw a bunch of flood walking through the city.
"I heard you have fire powers, you especially will be useful on stopping this outbreak".
All of the pro heroes prepared for battle once the flood started invading the city.
Groups of the UNSC dropped in shooting the flood.
"Make sure everyone is evacuated from the city, there's a huge change the city will have to be blown up", said Hood on the communicator.
"Sir yes sir", said Griffin.
"Everyone get your flame throwers ready", said a marine.
"The flood is weak to fire, this is why we need you most", said Griffin.
"Then it's time to burn these ugly parasites", said Endeavor.