The Comprehensive Evolution of American Comics

"Let's go, guys!" Steve knocked a robot away with his shield.

"We have to suppress them here, we can't let them get into the city!"

"Boom!"

Accompanied by thunder, Thor fell from the sky into the enemy ranks, shattering many robots.

"Get out of the way!" Diamondhead shouted, plunging his arms into the ground, and countless crystal spikes erupted from the ground, attacking the robot army. The spikes pierced the robots' bodies, hanging them on them. Those who had not lost their ability to move struggled, but were pierced from the inside by more spikes growing on the crystal spikes, completely destroying them.

These damaged robots would become Upgrade's resources, providing him with a constant supply of parts and weapons.

Steve hid behind cover, dodging the aerial fire, and shouted on the team channel.

"Someone take care of the aerial units!"

"Leave it to me!" Upgrade put away his machine gun, took a running start, and soared into the sky.

"Transformers, transform!"

Upgrade's body changed, and a Quinjet flew towards the enemy in the air.

Although Upgrade transformed into a Quinjet, it was completely different from the real thing. He transformed two machine guns from the bottom of the fuselage, but instead of bullets, they fired Upgrade's own lasers.

"Good job!" After Upgrade reduced the aerial firepower, Steve was finally able to poke his head out. Now that Pietro was gone, he was the only one left who couldn't block bullets with his body.

"Captain America."

Ultron's voice sounded from behind. Steve turned around and only saw something attacking him. He subconsciously raised his shield, and with a clang, Ultron's fist hit his shield solidly.

It happened so suddenly that Steve didn't have time to exert force, and he flew out. With his rich combat experience, he rolled continuously in the snow to dissipate a lot of force, adjusted his posture, and threw the shield in his hand.

Ultron waved his hand to knock it away, and the shield that was knocked away stuck into a tree beside him.

"You look a lot bigger than you did in the interrogation room," Steve said. "Did you take some kind of hormone?"

"When you see that your shield can't hurt me, you should know," Ultron stretched out his right hand, sucked the shield back from a distance, and held it in his hand.

"My material is the same as your shield. I'm curious how Captain America fights without a shield."

Ultron turned around and stretched out his hand to block Four Arms' cleaving giant sword. With a bang, the surrounding snow was blown away, and Ultron's feet even sank into the ground.

"The entire legion is my eyes, and sneak attacks are useless to me."

Ultron's eyes flashed red, and he used the anti-gravity system to push away Four Arms, who was preparing to attack again.

Just as Ultron was about to pull out his legs, several crystal spikes arched him into the air. The spikes continued to grow, but they could not cause any damage to Ultron. Only the constantly shattering crystals fell to the surroundings.

Ultron activated the anti-gravity system and pushed away all the crystals that wrapped him, hovering in mid-air.

Upgrade's transformed Quinjet projected a missile, which was once again blocked by his anti-gravity system and reflected back. Upgrade immediately climbed to avoid the missile.

Ultron turned to another direction and forced back Thor, who was attacking with the power of thunder, with a laser.

Hulk rose from the ground and jumped into the air, trying to pull Ultron down from the air, but because he was not agile enough in the air, he was punched down by Ultron after dodging the attack.

"You can't stop me!" Ultron looked down at everyone from the air. Behind him was his mechanical army, densely packed like locusts. Ultron, including the mechanical army behind him, began to become brighter and brighter.

"Guys, I bet they're going to shoot something!" Thor said loudly.

"You don't need to tell us that!" Diamondhead strode forward and plunged his hands into the ground again, and a crystal barrier rose from the ground.

As soon as the barrier rose, countless lasers attacked, too fast, exceeding the speed at which the barrier rose.

"Get down!" Steve shouted, falling forward and hiding behind the crystal barrier.

The remaining guys who were invulnerable to knives and guns did not dare to be careless. So many lasers hitting their bodies, although they would not die, injuries were inevitable. No fool would take it head-on, and even Hulk knew to avoid the edge temporarily.

The crystal barrier slowly rose in damage and repair. Facing such a strong offensive, Diamondhead was a little overwhelmed and could only grit his teeth and hold on. Ultron's energy was not infinite, and it would run out eventually.

Finally, the lasers stopped after another thirty seconds. Diamondhead gasped for breath, half-kneeling on the ground. He had never been so tired, and he felt like his body had been emptied.

"Look at you," Ultron looked down at everyone. "You keep saying you want to stop me, but now you can't even get out of your tortoise shell."

Four Arms stood up from behind the barrier and threw the giant sword in his hand, but it was shot down by several robots beside Ultron.

"If you had prepared a little more, you might have had some chances, but you who are afraid of me doing something obviously can't wait that long," Ultron looked at everyone contemptuously.

The situation has been reversed, from Ultron desperately needing time at the beginning to the Avengers not daring to waste time now, only a few days have passed.

"Stop talking nonsense!" Thor waved the hammer in his hand.

"We will solve you here."

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"Solve me here?" Ultron seemed to have heard a joke and couldn't help laughing.

"You don't dare to let me leave, you don't think I can't see that you don't dare to let me enter the city, do you?"

"I was just playing with you before, now I can get serious."

As soon as Ultron finished speaking, there was a shaking of the earth, like a dragon turning over, and a Chitauri Leviathan drilled out of the mountains in the distance.

Sand and stones rolled down from the Leviathan's body. This Leviathan, modified and revived by Ultron, crawled towards them from the air, winding like a snake.

"I hope you like it," Ultron led the legion and began to climb, as if avoiding something.

Soon everyone knew what Ultron was avoiding. The Leviathan opened its bloody mouth, revealing a dark cannon barrel. The cannon barrel was as wide as a person, and with a deafening roar, it was obviously ready to fire.

"Can you withstand this?" Steve looked at Diamondhead beside him.

"No," Diamondhead replied simply.

"We have to stop it before it fires, otherwise..." Thor said.

"No," Upgrade interrupted Thor.

"It's too late."

"TMD!" Four Arms cursed and jumped out of the barrier and ran towards the Leviathan.

"Everyone hide!"

"Four Arms, come back!" Steve shouted immediately.

Four Arms turned a deaf ear, jumped into the air with his strong legs, and pressed the Omnitrix on his belt at the same time.

The Leviathan had also finished charging, and a thick beam of energy sprayed out of its mouth. The dazzling white light made people unable to open their eyes.

Steve tried desperately to open his eyes, but he could only vaguely see Four Arms' figure gradually changing in the white light.