In the Stark Industrial Building, Tony is debugging his steel mech, Mark 4.

The Mark4 Steel Warframe took a week to complete, and Tony stared at the progress bar in deep thought as Jarvis waited for him to load the system into the mech.

Mark1 "Tin Can Mecha" is the first generation of mecha he and Dr. Ethan created in the cave, although the work is rough and ugly, Tony piloted this generation of mecha to defeat the terrorists and successfully escape from the terrorist station.

Unfortunately, Dr. Ethan died under the terrorists' guns in order to buy him time to activate the mech......

The Mark2 is the first Stark industrial-grade warframe, which is mainly used to test and explore all aspects of armor performance.

Tony flies freely in the air for the first time in this silver-white armor, and discovers the problem of freezing the high-altitude mech during the flight.

In Mark3, the genius Tony easily solved the problem of high-altitude icing of the mecha, he sprayed Mark3 with red and yellow spray paint, and equipped the shoulders and legs of the mecha with a large number of combat weapons.

Tony piloted the Mark 3 to clear several terrorist locations, and accidentally got into a fight with two military fighters, which ended in his victory.

But Tony didn't expect that the steel armor he was proud of would be vulnerable to that demon...... It can even be said that the demon has completely exploded the crystallization of his wisdom and technology.

The first is flight speed, as the Iron Armor's hands and boots can simultaneously emit arc pulses, creating ultrasonic waves that allow the armor to fly or fly at high speeds.

But even if he increased faster than the speed of sound, he couldn't shake off the demon, and Jarvis detected that the demon's speed reached Mach 2, which is a speed that the Iron Warframe Mark 3 could not achieve.

Then came the weapons attack, and as the world's largest arms dealer, Tony has been involved in arms since childhood, equipping his armor with a large number of weapons, as well as a state-of-the-art dynamic tracking and targeting system.

But even then he couldn't hurt the demon, but the demon's attack could easily break through his mech, and he had to land when the mech's damage exceeded 60%......

"Sir, the system is equipped."

Tony's thoughts were interrupted by Jarvis's tone, and he came back to his senses to focus on Mark4, which was ready.

The color of the Mark4 is still the classic red and yellow paint, and the chest, shoulders and abdomen of the armor have been newly designed, and a new filtration system has been added.

Although there are not many adjustments in appearance compared to the Mark3, there are many internal changes.

First of all, Tony optimized the energy output system of the four main parts of the mecha, greatly increasing the output power of the arc pulse, so as to pursue higher speed.

Secondly, Tony is equipped with more weapons on the mech, palm cannon, mini missiles, arm built-in missiles, jamming bombs, and miniature missiles built into the shoulder attached compartment.

In order to be able to load more weapons on the mech, Tony even did not hesitate to give up the lightness of the mech, and now the Mark4 is simply a mobile arsenal, even if it attacks with firepower coverage, it can hold out with the enemy for more than half an hour.

Not only that, but Tony also added a close-range weapon specifically for the mech to deal with melee attacks from demons or other enemies.

For example, the Steel Mech is equipped with a single-use laser weapon that can be used to cut through anything in a short period of time. It is also equipped with high-powered energy lightsabers on both arms, which can easily cut through steel, and no carbonyl creature can resist its cutting with its flesh.

In the end, Tony also added the defense system of Mark4, and now against the demon's "palm cannon" and "laser eye", Tony is confident that he can easily deal with it.

"Sir, are you starting the test?" Jarvis asked.

"Start the test, the arc pulse test is on, and the high-speed flight stability test is on." Tony kept giving orders.

Mark4 is activated by Jarvis, igniting reddish-yellow flames under its palms and boots, and the number on the screen showing the maximum speed that the mech can reach is constantly rising.

"High-speed flight stability test, test successful!" Jarvis reminded.

Tony's face was heavy, and he stared at the armor that was still increasing its power.

Finally the numbers on the screen kept rising, reaching twice the speed of sound.

"The arc pulse test was successful, and the maximum speed was Mach 2."

Tony held back his excitement as he continued to give orders:

"Weapon Test, Laser Weapon Test, Two-Arm Energy Lightsaber Test ......"

An hour later, with the help of Jarvis, Tony finally completed all the tests on Mark4, and as he browsed through the data reports, Tony couldn't help but raise his arms and shout, but unfortunately now there was no one to share his joy.

"Demon, looking forward to the next encounter with you!" Tony said in his heart.

Suddenly, the alarm light went off, and Jarvis sounded the alarm when the alarm bell flashed: "Sir, the radar scan has detected that someone is intruding into the Stark Industrial Building, but the surveillance system does not give an alarm, and the system analyzes that the intruder has a 90% probability of being a demon." ”

"Damn it!" Tony had just asked Jarvis to help him put on the Mark4 with a robotic arm, but the automatic door to the lab had already opened.

"Good evening, Tony Stark."

As the voice fell, a figure slowly emerged.

Tony's expression was a little unnatural, and lately he had been thinking back to what had happened that night, and the sound was almost a nightmare for him.

The demon is still dressed like that, with normal clothes and a demon mask, flamboyant and calm.

"Good evening, my friend!" Tony greeted with a smile as he walked out of the lab to the side bar, "Would you like a whiskey?" ”

"No need, please." Loxia smiled as well, and he walked straight to the steel armor that was placed aside.

The steel armor that has not yet been activated is also full of technological style, with a streamlined body, reflective metal texture, and the classic red and yellow color scheme, which is very cool.

Seeing Loxia approaching Mark4 Tony's expression was even more unnatural, and even the villain system had captured Iron Man's nervous negative emotions.

"Is this the new toy you've made?" Rorschach stroked the steel suit with her hand.

"Obviously it's not a toy, it's called Mark4." Tony raised his head and drank the wine in his glass, suppressing his feelings, "I'm sure you'll face it one day." ”

"Do you want to put it on and talk to me again? I can give you time. "It seems that by curling up in this steel suit, you will feel a little more secure." ”

"No, obviously not! Aren't we friends? Tony propped his forehead and said, "You have something to say right now." ”

In fact, he felt that the demon's proposal was very good, and he even had the confidence to defeat the demon by wearing Mark4.

But he couldn't figure out the true intentions of the demon, after all, the strength of Mark4 was exchanged for lightness, and it would take him a few minutes to put it on, who knows if the demon would suddenly change his mind in these few minutes......