Summon the Villain: Marvel.

Crossbones' body was eroded by the Extremis virus, but his power became stronger. He stood in the blazing flames, like a god of fire descending to earth. His silver armor was reshaped in the flames, and his wounds healed at a speed visible to the naked eye. His self-healing ability made him invincible.

\"This is impossible!\" Steve gritted his teeth, his shield still raised in front of him, trying to block Crossbones' attack.

The Hydra members saw Crossbones rise again, they cheered in encouragement and rejoined the battle. The light of the fire illuminated the entire room, and the agents had to shield their eyes with their hands to avoid being blinded by the glare of the fire.

Hawkeye and other agents are also trying their best to resist the attacks of flames and Hydra members. Hawkeye's eyes are locked on Crossbones. He understands that the opponent's power comes from the Extremis virus, but now they must find a way to subdue him.

Crossbones' fire power became stronger and stronger, and his attack range continued to expand. Steve felt that his shield could no longer withstand the high temperature of the flames, his clothes began to melt, and his skin felt hot.

\"Captain, we must retreat!\" Hawkeye shouted, his arrows unable to penetrate Crossbones' armor.

Steve understood that Hawkeye's suggestion was correct, and they had to temporarily withdraw from the battlefield and find a more effective way to deal with Crossbones. He nodded and signaled the agents to retreat, and everyone tried to avoid the flames and fled to the exit of the building.

However, the Hydra members would not let them get away easily, they chased them relentlessly and attacked them continuously. The agents were exhausted and their strength was gradually depleted.

Just as the agents were in trouble, a violent light suddenly shot down from the center of the building's ceiling, knocking the Hydra members back. The light dissipated, revealing a familiar figure, it was Tony Stark, wearing his Iron Man armor.

\"Does anyone need help?\" Tony's voice sounded, and the beam weapon in his palm was already equipped and ready to attack.

Steve breathed a sigh of relief, knowing that Tony's arrival would bring them new hope. "Tony, we need your help, this guy's ability is beyond our imagination."

Tony nodded, his armor making mechanical sounds as he locked onto Crossbones. \"Skullface, huh? I'll take care of him.\" Tony's flight device activated, and he quickly flew towards Crossbones.

Crossbones saw Iron Man coming and immediately changed his target, turning the fire attack to Tony. Tony's armor was covered with a powerful energy shield, and he was able to withstand the invasion of the fire.

\"This is no time to joke, let's go!" Steve shouted loudly, leading the agents to continue evacuating the battlefield and moving towards the exit of the building.

The battle between Tony and Crossbones became extremely fierce, with flames and beams intertwined, bursting into dazzling light. Tony's Iron Man armor has excellent firepower and defense capabilities. He constantly attacks Crossbones, trying to weaken his opponent's power.

"It's not an ordinary Extremis virus. It seems to be the same as Aldredge, or even an optimized Extremis virus." Tony Stark's mechanical prosthetic eye scanned the heat in the other's body.

Crossbones is not easy to deal with, his flame ability is constantly upgraded, and it seems that there is no limit. Tony must constantly adjust his tactics to find a breakthrough in the attack.

"The injection for the Extremis virus seems to be ineffective on him. But I have thought of countermeasures against energy or elements." Tony perked up and shot out a beam of light from the palm of his armor.

At the exit of the building, Steve and the agents were ready to evacuate. However, the Hydra members did not let them leave easily. They set up heavy defenses at the exit and blocked the passage.

\"We have to break through their defenses!\" Steve ordered, picking up his shield and preparing to charge.

The agents also quickly prepared themselves, knowing that this was a life-and-death battle. Steve rushed out first, blocking the firepower of the Hydra members with his shield. The agents followed behind him, launching a fierce attack, trying to break through the defense line.

The battle broke out at the exit, sparks flew, gunfire continued. Steve kept blocking bullets with his shield, while punching the Hydra members hard, knocking them down.

Tony also kept trying in the battle with Crossbones, firing his beam weapon continuously, trying to penetrate Crossbones' armor. But Crossbones' self-healing ability made him more and more difficult to deal with.

\"Tony, we need a way to control fire!\" Steve delivered the message through the communication device. He knew that unless he found a way to weaken Crossbones' fire ability, the battle would be a stalemate.

"Leave it to me," Tony shouted, his armor equipped with various technological devices, including energy absorbers. He began to analyze Crossbones' flame energy, trying to find a way to control or absorb it.

At the exit, Steve's battle with the agents was still going on fiercely. Hydra members kept pouring in, and they resisted desperately, determined not to let the agents pass.

Suddenly, a strong light shone down from the center of the ceiling, covering the entire battlefield. Steve and the agents felt a warm energy surrounding them, while the attacks of the Hydra members became increasingly weaker.

\"What's going on?\" the agents asked in surprise.

Steve looked up at the ceiling and saw Tony Stark, his armor emitting bright energy, as if a savior had arrived. Tony's energy absorber successfully controlled Crossbones' fire ability, while radiating healing and protective power outward.

"what!!!"

The flames erupting from the crossbones were being controlled and slowly solidified...

"Tony, you are a genius!" Steve said excitedly.

Tony smiled, and a voice came from his armor. \"Stop talking nonsense, go! I will try my best to maintain this energy field, but time is running out!\"

Steve and the agents hurried through the energy field and continued to move towards the exit. The Hydra members were restrained by the energy field and could no longer launch effective attacks. They angrily tried to break free, but to no avail.

Tony stood his ground, continuing to maintain the energy field. His armor began to vibrate slightly, bearing the enormous pressure. However, he was determined to hold on until Steve and the agents were safely evacuated.

Finally, Steve and the agents successfully escaped from the building and came to a safe area. They breathed a sigh of relief, looking at the energy field in the building, knowing that Tony was working tirelessly.

"It's time to retreat." Tony looked at Crossbones who was gradually breaking free and left immediately.

Eventually, Crossbones' body gradually stopped burning, and his armor returned to normal. The energy field gradually dissipated, but his eyes were cold and radiated a fiery fury.

"Next time, next time, I will definitely kill you, not just the Avengers, but all of them."

"The superheroes of Hawke Group."

......

\"Good job, Tony.\" Steve gave him a thumbs up to show his respect.

Tony took off the helmet of his armor and smiled. \"Of course, Captain. This is the power of Stark.\" Tony said narcissistically.

The agents also expressed their gratitude, knowing that if it weren't for Tony's timely action, the battle might have ended in failure.

"Tony, why are you here?" Hawkeye asked, vaguely guessing the truth in his heart.

Tony raised his shoulders slightly, and a lot of dust fell off his armor. Then he smiled and said, "Oh, I was originally planning a grand and charming night, but a phone call told me that I had a woman's intuition and felt that something was going to happen between you two, so I came here."

Women's intuition.

Hawkeye and Steve glanced at each other subconsciously, and then Steve laughed and said, "It seems that Natasha's intuition is quite accurate."

A smile appeared on Hawkeye's lips, but then he calmed down again.

"Clinton, I know what you're thinking." Steve sensed Hawkeye's inner thoughts and said to Tony, "Tony, the opponent's Extremis virus has the fire ability."

Tony also calmed down and nodded, "The superpower Extremis virus, a technology developed by Aldredge and the mysterious force."

"The mysterious force is, as expected, Hydra." Steve said seriously.

"If it's Hydra, then everything makes sense."

Tony put on his helmet again, and as a projection appeared from his eyes, Tony said loudly, "This is the data I collected. Data from the European battlefield."

In the video, a handsome and domineering white-haired man holding a long knife cleanly and neatly eliminated a group of warriors using various super powers.

"This." Hawkeye and Steve frowned at the same time.

"From the video, we can see that these super powers and energy, after my analysis, if combined with the Extremis virus, especially the heat that the Extremis virus originally possesses, can be transformed into flames. Super powers plus the Extremis virus, this may be what Aldredge said, the super power Extremis virus."

"Any solution, Tony?" Steve asked, because in this situation, only Tony Stark was the key to solving their problem.

Tony snapped his fingers and said, "Yes, that is energy conflict. Based on the combat data analysis I just did, I can make a reactor energy interference weapon."

Hawkeye and Steve listened quietly.

"Use energy to interfere with the desperate virus in the opponent's body, causing rejection and confusion in the opponent's body, thereby triggering heat in their body, causing their body to burn or explode."

After hearing this, the two nodded repeatedly.

"To deal with Hydra, especially the super-power Extremis virus, we can only be determined to kill the opponent." When Tony said this, his tone was very un-Tony Stark, and very calm.

Steve sensed a change in Tony Stark's tone and immediately remembered what Natasha said, that Tony was in love, and this time, he was no longer a playboy. Perhaps something happened between Tony and his other half, which made Tony no longer be full of determination, forge ahead, have firm beliefs, but be cynical and domineering.

Hawkeye just stared at Tony silently.