In the medical room of New Avengers Base, the rescued scientists gradually woke up. Tony·Stark and Bruce·Banner were asking about the situation, but received confusing answers.
"We just remember doing sonic research and being in the water," the lead researcher said blankly. "There was something singing..."
Natasha checked their medical data. "There was no trauma, no traces of drugs, but the brain waves showed that they all experienced extreme fear."
Suddenly, all the medical equipment made a harsh noise at the same time. Friday immediately reported, "Abnormal infrasound waves were detected, the source is unknown."
Steve looked around alertly. "Again?"
"This time is different," Vision said suspended in the air, "The sound waves are targeting specific frequencies - exactly the most active areas of the brain for scientists."
In the medical room, the scientists suddenly hugged their heads and screamed. Scarlet Energy in the hands of Wanda immediately enveloped the room. "Someone is remotely affecting their thinking!"
Tony quick operation console. "Friday, track the signal source!"
"The signal comes from the bottom of the sea, but its location is constantly changing. It seems that there are multiple emission sources working alternately."
At the same time, Malibu Beach on Xiao Han was trying to enjoy the afternoon sunshine, but some kind of continuous low-frequency sound wave made him sit up irritably.
"Friday, what's going on with this noise?"
"Abnormal acoustic activity on the seafloor has been detected, which is related to the interference in the medical room. Do you need to notify Mr. Stark?"
"No need." Xiao Han's eyes flashed red, "It's too noisy."
He took a deep breath and blew an extremely cold breath at the sea surface. The sea surface froze instantly, and the sound waves stopped. But a few minutes later, the ice broke and the sound waves sounded again, this time with an obviously provocative rhythm.
"Playing with this?" Xiao Han raised his eyebrows, "Then I'll play with you."
He flew high into the sky, and Heat Vision accurately shot into the bottom of the sea. The explosion sounded muffled, and the sound wave stopped temporarily. But it soon sounded again, as if mocking his efforts.
In the new base, Tony received an alert. "He is frying fish again?"
"The target appears to be a sonic emitter," Friday reported, "But new ones appear immediately after each destruction."
Banner analyzed the data. "These launchers are imitating and learning. Each time they are rebuilt, they become more difficult to detect and destroy."
Natasha suddenly thought of something, "If the other party is at the bottom of the sea, he may need professional help."
T'Challa's holographic image was timely accessed. "Wakanda's deep-sea detector discovered an anomaly. I suggest you take a look at this."
The picture shows that there is a huge Hive-shaped structure deep under the sea, which is constantly manufacturing and emitting sound wave devices.
"It's like an undersea 3D printer," Tony marveled, "But this technology is far beyond the current level."
Steve issued the order, "We need to investigate in depth. Tony, prepare the deep sea battle armor."
"No need to bother." Xiao Han's voice suddenly interrupted, "It's too deep. Your tin can can't handle the water pressure."
"Hey! My armor can dive to..."
"To Mariana Trench?" Xiao Han interrupted, "That thing is singing down there."
Everyone was stunned. Tony quickly retrieved the data. "He is right, the signal source comes from the deepest part of the trench."
Suddenly, there was a huge vibration from the bottom of the sea. Hive Structure began to rise, bringing countless sound wave transmitters to the surface of the sea.
"It's moving towards New York!" Banner exclaimed, "At this speed, it will arrive at the port in three hours!"
Avengers takes action immediately. Tony and Rhodes are equipped with deep-sea battle armor, Steve and Natasha are ready to command surface operations, and Wanda and Pietro are responsible for evacuating coastal residents.
Xiao Han looked at Hive who was gradually approaching, impatience flashed in his eyes. "So now we are going to fight an underwater world war?"
Hive suddenly released powerful energy fluctuations, and the entire electronic equipment of East Coast was instantly paralyzed. Avengers's armors called the police one after another.
"Electromagnetic pulse!" Tony shouted, "It's imitating our technology!"
The surface of Hive opens, revealing countless sound wave emitters inside. They start at the same time, and the sound waves they generate make the sea surface boil.
"Friday, analyze the weaknesses!"
"The structure is too complex and requires more time..."
Xiao Han suddenly flew towards Hive: "No time."
In his eyes, Heat Vision exploded with all its strength, but a Vibranium coating appeared on the surface of Hive, dispersing the energy throughout the structure.
"It's learning!" Banner exclaimed, "It's adapting to your attack method!"
Hive began to counterattack, launching an attack that mixed sound waves and energy. Xiao Han easily dodged it, but the attack went straight to New York.
"Oops!" Tony tried to intercept, but it was too late.
Just when the attack was about to hit the city, Xiao Han appeared in front at super speed and blocked the attack with his body.
"It's interesting." He patted the dust on his chest, "But it's still far from it."
Hive seemed to be enraged, and all the transmitters were aimed at him at the same time. But at this moment, another huge black shadow suddenly rose from the bottom of the sea.
"What is that?" Natasha exclaimed.
A larger underwater structure emerged, shaped like an ancient palace. It emitted a unique sound wave, causing Hive to stop moving instantly.
"They are having a conversation!" Banner analyzed the sound wave pattern, "It's some kind of ancient language!"
Ancient Structure turned to Avengers and emitted a soft sound wave. Vision translated. "It is apologizing. It says that Hive is their out-of-control creation."
Xiao Han landed on Ancient Structure: "So you are the landlord? Take care of your tenants."
The structure emits pleasant sound waves, and Hive slowly sinks back to the bottom of the sea. The crisis seems to be over.
But after returning to the beach, Xiao Han found a shell-shaped communicator on the beach. The voice of Mr. Tea came from inside:
"Wonderful performance. But didn't you notice? The technology used by 'Ancient Structure' is the same as Hive."
Tony quickly confirmed this guess. "They are acting! To test our reaction!"
Xiao Han crushed the communicator, golden light flashed in his eyes.
In the deep sea, two structures are exchanging data. New messages are spreading under the sea:
"Testing completed. Objectives met expectations. Final phase begins."
But this time, they were sure they had found the right approach.
After all, the most successful traps are often the ones that let the prey walk in on their own.