[Mecha damage 39 percent]
"I will let you remember your grandma!" Marvin yells in anger and slams his both hands on ground and clicks on buttons on his gloves as soon as mecha hands touched ground.
A big shockwave formed, causing all loki illusions to dissipate and real loki who was invisible was slammed in the wall of nearby building.
Marvin seized the opportunity and before loki can come back to his senses, he leaped forward and punched with his full force.
Loki who came to his senses was about to stand up when he felt a big shadow covering him.
He raised his hand and saw a already big fist zooming in his vision.
Loki was punched and flew back making holes in building and stopped when he touched third wall, but still broke the wall down.
Scepter flew and fall aside Marvin.
Marvin picked up scepter and looked at stark tower and scepter hesitantly.
"Okay let's do this." Marvin muttered and started running towards the stark tower holding the scepter in his palm of mecha.
In few big leaps he arrived at foot of tower and looked up.
He didn't want to get out of mecha.
"Turn off the jammers." Marvin muttered.
[Jammers closed]
[Incoming call]
"Pick it up."
"Hello?" Tony stark's voice came.
"I know the way to close the portal, come to foot of your stark tower." Marvin said and turned on the jammers.
He stood there punching any chitauri coming near him.
After a while came Tony stark, he flew in front of mecha with equal height.
Mecha opened his arm.
"Pierce the shield covering the portal generator by this scepter." Mecha's magnetic voice sounded.
"Okay, by the way I love the voice of your mech." Tony said and flew up taking the scepter.
Tony landed in front of shield generator and aimed the scepter at shield generator, but as he was about to pierce the shield generator.
"Sir, nuclear warhead incoming." Jarvis's voice sounded.
Tony stopped and looked at his right, his visor zoomed in the nuclear warhead incoming.
"Shit!" Tony muttered, he didn't know what to do, as he can't leave scepter alone and no avenger is nearby.
The butterfly of Marvin caused every avenger except tony stark to be away from stark tower as chitauri's numbers were many times of that in movie, causing avengers to stop chitauri from spreading in the whole city.
"Tch looks like I have to do whole work." Marvin muttered as he spotted few chitauri scooters and a grin broke out on his face, he picked up scooters and fused them on beneath his palms, foot and on the back, as for flying system he has already installed that on his mecha, everything must be prepared for emergency.
"Throw out the driver and start the remote control system." Marvin muttered as he felt the cockpit he was in was thrown out by mecha, making him crash into nearby building.
Marvin didn't cared and clicked on button on his palm causing mecha to fly up.
Mecha flew up and speed was increasing with each passing second.
Tony stark who has finally decided to throw nuclear warhead in the space through the portal was about to take off but was surprised as he looked at mecha flying towards the nuclear warhead.
As soon as mecha reached near nuclear warhead, it captured nuclear warhead and hugged it and flew towards the portal.
Nuclear warhead's rocket propulsion system increasing the speed of mecha by 2 times.
"Please clear the way!" Mecha's speaker system initiated the warning with loud voice.
Hearing this thor looked down as he was fighting chitauris incoming through portal.
He quickly started rotating his hammer and aimed it at portal turning incoming chitauris into ash and liquid metal.
"Start the override mode." Marvin ordered, causing mecha to speed up many times.
"Hey Tony stark turn off the portal as soon as I passed through it, okay." Marvin send the message to tony stark.
Tony wanted to say something, but Marvin blocked the tony.
He knew he can't always block out tony stark, but he can for few minutes until mecha passes through the portal.
As soon as mecha passed through the portal, tony stark closed the portal.
"He was a great hero, he has my respect for his great sacrifice." Thor said as he landed on the stark tower rooftop.
As soon as portal closed all chitauris stopped working.
Avengers returned to stark tower.
Iron Man was stupified looking towards the direction where portal was not there anymore.
Marvin did a mischief and that was he made a video of high level civilization spaceships.
As tony finally hacked the system of mecha and wa about to control it to comeback, but portal closed.
As he can only retrieve one video back and that was video Marvin made.
In this video was that nuclear warhead but the spaceships in space, but energy shields blocked it like egg against stone.
And the vast number of spaceships and the tech these spacebsips used were behind what Tony ever made in any comic universe.
"They were using antimatter and black holes like nothing, they just sent their weakest army to invade us, yet we were gradually losing the war." Tony muttered.
"Affirmative sir." Jarvis replied.
"I have to make more powerful suits, spaceships, and cover the earth with high tech attack and defense shield, we have to make systems to migrate earth's population, if failed to stop the future invasion." Tony muttered.
"Yes sir, your strategy is most correct against the possible future invasion." Jarvis replied.
"Hey stark what happened to you? I know you're mourning for that hero, we will make a statue for him, but now be happy we have stopped the invaison." Thor said.
"No we were lucky this time, they are coming with more forces." Tony said.
"Hmm what do you mean by that tony?" Bruce said.
"Ah nothing, I'm just talking to myself." Tony replied.
"Let's go eat best pizza, I know a good place." Tony said as he walked forward.
Seeing tony going thor and Bruce followed him, thor taking loki with him.
Natasha and Hawkeye looked at each other with a silent understanding.
On the other side.
Marvin changed his clothes and put the suit in cockpit and after setting the timer of 20 minutes, he started running towards his warehouse while hiding from cameras.
He dirtied himself with dirt so no one will suspect him as for helmet on his head, he put shawl on his head.
After running for a while he arrived 2 kilometres away from his cockpit.
*Boom
He heard a muffled voice, which was explosion caused by his cockpit.
He still didn't stopped and just walked.
Avengers were alerted with untimely explosion and arrived at the collapsed building.
After cleaning the debris they only found charred steel fragments.
"Sir there is nothing here." Jarvis replied after scanning the site.
"But this explosion is definitely suspicious." Natasha said and everyone nodded.
...
Warehouse.
Marvin was washing himself.
He has sold all of his property to make that mech, now he only has 6000 dollars in his hands.
"Let's start by making mini robots which can fight like real humans and make an robot arena across the world." Marvin muttered as he looked at figurine of robot version of Captain America.
Most of the movies and web series and games in these world were following the trend of captain America, if not how can he be so famous.
There is also an exception of Star Wars in this world.
"Should I buy Star Wars?" Marvin muttered.
"Nah, let's make something which doesn't exist and also modify them so they will be more famous than my previous life, as many directors ruined the movies either making characters to weak or too emotional or letting them die early as actors were becoming famous causing them to pay more." Marvin muttered.
"Hmm let's first make these robots and after gaining certain amount of money, I will make a entertainment company of mine." Marvin muttered.
...
One month later.
Looking at the prepared warehouse, Marvin was satisfied.
He has made many fusions and after extracting their codes and degrading the mini robots he has already made few dozen main robot designs and also made a small manufacturing line in the office as long as he will put the parts in machine will quickly assembled the robot.
All thanks to fusion system.
He transformed half of the part of warehouse in mini city as a battlefield for mini robots.
He has also advertised this robot fight for past one month.
He also has advertised about his highly functional mini robots in Midtown High School.
There was no age restrictions for participants in this competition he was holding in his warehouse.
He has already got the permission via help of small lawyer with low fees.
And also hired May Parker who was jobless cause the hospital she worked in was blown by chitauris.
The main surprise was that she was the woman who helped him when the hulk damaged across the city by bandaging the people.
May readily agreed as she found that the man who hired her was an good person.