The squalor of the underground is really unbearable, especially the pungent smell caused by the mixture of things that I don't know what or is simply a mess of things, and what is even more unbearable is that as they continue to move forward, the smell is constantly changing, but none of them can make people breathe out at ease.

However, this is not a problem for Harry and the Winter Soldier, both on Harry's suit and on the Winter Soldier's equipment, there is a mask, and it is definitely a mask that can block odors.

"Crimson, how far is it? I don't have a gas mask! Hawkeye glanced left and right, then wrinkled his nose vigorously and turned back to the little crimson who was walking behind him.

"It's coming soon, and one more turn in front of you is the intersection of the underground pipes, and then further on is the source of the signal." Crimson covered her nose as she looked down at the large red signal dots that were getting closer and closer on the display screen, and responded softly.

"Great." Hawkeye breathed a sigh of relief.

"Everyone raise their vigilance and look around, Ultron is very likely to arrange an ambush here." Black Widow touched her hands behind her back, and the two delicate pistols were immediately grasped by her, with full vigilance in her eyes.

Her words fell, and Harry and the others were no longer the same casual attitude as before, Hawkeye pulled out an arrow from the quiver and pulled the bow, his eyes were sharp and worthy of his name, the Winter Soldier was indifferent and speechless, but he quietly came to the front of the team, and used his actions to correct his name, Harry was naturally no exception, he had already held the double knives that were originally behind his back in his hands, and his spiritual power swept forward.

After all, they are not here for a day trip underground, even if they make smoke bombs, but when they are faced with an enemy like Ultron, they can't hold it up, otherwise they may capsize in the gutter if they don't pay attention, and the danger of the goal they want to achieve now obviously does not allow such an accident.

Several people gradually moved forward, but their steps were a little slower than before, but they were obviously more calm.

Following the route, the men made a turn, and then continued on, and just as they had just taken a dozen steps after the turn, a faint and rapid beeping sound suddenly sounded, but completely different from the situation in the underground pipe.

"Stand back! It's a bomb! The Winter Soldier, who was at the forefront, immediately shouted, and at the same time turned around with a swift turn, pushing the Black Widow who was following him backwards, himself taking a step to dodge the explosion.

The explosion was apparently faster than his muscular body, and at the moment he pushed Black Widow away, a loud bang came directly into the ears of several people, and when the explosion sounded, the dirt above his head suddenly cracked, and at the same time as the smoke and dust exploded, the debris fell on the head of the Winter Soldier.

Although Xiao Crimson, who was originally walking at the back, was separated by a few people, she still saw this situation, her brows frowned slightly, her face was serious, and with a low cry, the crimson mist energy immediately caught the smashing stone.

I saw that surrounded by the crimson energy, the scorching orange-red flames in the large pieces of broken stone seemed to stop, and it looked as beautiful and real as the condensed amber, but in the real beauty of this Yaang was full of terrifying power.

And under such a terrorist explosion, even the power of Crimson obviously can't last long.

It wasn't a long time, and before the Winter Soldier could come out from underneath it, a trace of sweat broke out on the beautiful forehead of the little crimson, and the crimson energy wrapped around her hands also became trembling and faint, like a candle in the wind, ready to dissipate at any time.

"Hurry up and get out! The explosion was so violent, I ...... I can't hold it anymore. Little Crimson shouted with a trembling voice and an anxious face.

"Not good! That's Stark's Ark reactor, and Ultron got it out of control! Black Widow glanced at the frozen explosion and immediately made a judgment.

As soon as her words fell, everyone was stunned.

Even if Stark's ark is made of new energy technology and is very stable, if it is deliberately detonated, its power is obviously not under the small nuclear weapons, and once such a violent explosion occurs in this crowded and narrow pipe, then several of them will definitely be shrouded in it, and the ground above their heads is likely to be directly lifted out. Not to mention a few of them, let's just say that above this pipeline, there are tens of thousands of residents, and the most likely thing is that when the explosion sounds, both them and the crowd above will be directly annihilated.

And judging from the little crimson appearance, she obviously couldn't control the explosion.

"Crimson! You've got to hold on, Clint! Notify HQ immediately and let them quickly move the residents above out of here! Black Widow immediately made a decision and shouted loudly.

"Good! I tried my best! After the little crimson finished speaking, she bit her silver teeth as if she had made up her mind, and in an instant, a powerful force suddenly erupted from her body again, and the dazzling crimson energy suddenly condensed, wrapping the explosion in clusters, and no longer had the bleak appearance before.

"It seems that our actions have long been discovered by Ultron." At this time, Harry suddenly spoke.

His spiritual scan had been completed at the moment when the explosion sounded, but Ultron, who was originally the target, was not here at all, as for those signal sources, he just wanted to say that Ultron's precautionary heart was too heavy, just like the news coming back in his mind, those signal source points that should have been placed in the materials of the steel fortress were not far away at this time, as for Ultron and the materials, there was no trace of them again, everything here was obviously waiting for them!

It's just surprising that in the face of such a situation, he didn't have any worries and nervousness, and even walked forward with a slight smile on the corner of his mouth. In fact, this seemingly dangerous situation was not really difficult for him, but it made him confirm the results of their smoke bomb operation, well, apparently successful.

"Harry! What are you going to do? Hawkeye immediately shouted as Harry walked forward, reaching out to grab him.

It's just that his grasp obviously failed, only to see Harry's figure flash, and then reappeared in front of the explosion, and at the same time indifferently stretched out his slender white palm and grabbed the explosion wrapped in crimson energy. (To be continued.) )