111: Chapter 111 The Ice Thorn's Final Sprint! Engine Overloaded by 130%

On the radar screen, the heat source intensity of the Ice Thorn Lv.4 Main City was still climbing, jumping from three times to three point five times.

The engine overload exceeded 130%.

Ice Thorn was treating the engine of its Lv.4 Main City like a one-time propellant; it didn't need endurance, it didn't need longevity, it only needed to push this steel giant city to its maximum speed in the final ten minutes of its life.

The speed climbed from twenty-two to twenty-three, then twenty-four.

Tens of thousands of tons of steel were accelerating on the ice; the thrust required to increase the speed by one kilometer per hour was double that of the previous kilometer, but Ice Thorn's engine was burning itself up.

"Speed twenty-four! Still increasing!"

Zhou Yuan's voice was strained to the limit.

"Three point five kilometers from the front of The City-State!"

Polaris was still on the right flank of the Ice Thorn Main City.

Lu Chen had tried every method possible; the Mechanical Arm couldn't break the connecting pin, the ramming horn had dented the driveshaft shield but hadn't broken it, and the exhaust port harpoon couldn't penetrate.

After the engine overload, the speed was actually rising again.

He knew clearly that the cards remaining in his hand couldn't kill a Lv.4.

"Brother Lu Chen!"

Lin Xiao's voice rang out on all frequencies simultaneously.

"Enough! You've already done enough!"

"Pull back!"

"I said it before! Hide behind me!"

Lu Chen's fingers paused on the steering wheel for two seconds.

In the past eight hours of combat, he had never paused for more than a second at any decision point; this was the first time.

"City-State Lord Lin Xiao."

"Don't waste time! Retreat!"

"Can your The City-State withstand a direct detonation of six tons of explosives?"

Lin Xiao was silent for a beat on the other end of the communicator.

"It can't."

"Then what's the point of retreating?"

"The point is that you won't be at the epicenter!"

Lin Xiao's voice squeezed out from between his teeth.

"The City-State is eight hundred meters long, four hundred meters wide, and one hundred fifty meters high! Even if the front is blasted through, the four hundred meters of depth behind it can still serve as a buffer!"

"As long as you and my sister are more than one kilometer behind The City-State, the attenuation of the blast wave will be enough to save your lives!"

Lu Chen glanced at the radar.

The estimated distance to the Ice Thorn frontal impact point was three kilometers.

Ice Thorn's speed was twenty-four, The City-State's speed was twelve, relative speed was twelve.

It would take fifteen minutes to cover the three-kilometer distance at a speed of twelve.

If they retreated now, it would take three minutes for Polaris to circle to one kilometer behind The City-State at a speed of eighty-five kilometers per hour; there was enough time.

"Battalion Commander Zhao, where is iron wall located behind The City-State?"

"Eight hundred meters directly behind!"

"Retreat another kilometer."

"No problem!"

Lu Chen slammed the supercharger to the floor, Polaris's engine roared, and the vehicle turned toward the direction of Black Rock City-State.

"Lin Wan."

"I'm here."

Lin Wan's voice was completely devoid of fear, leaving only calmness.

"We're going back to your brother's side."

"Okay."

Polaris disengaged from the right flank of the Ice Thorn Main City at a speed of eighty-five kilometers per hour and retreated at full speed toward the rear of Black Rock City-State.

Ice Thorn's voice rang out on the public frequency.

"Running away?"

"That little mouse ran away?"

"Run then."

"All of you run behind that big iron box, huddle together, so I can take all of you out at once."

Laughter welled up from the bottom of the frequency band.

Polaris bypassed the south wall of Black Rock City-State.

This eight-hundred-meter-long Lv.4 City-State class Mobile City was fleeing east at a speed of twelve.

The one hundred and three cannons on the walls were still firing toward the west in the direction of Ice Thorn, but the firepower had changed from a volley to intermittent fire because it no longer mattered.

The one hundred and three cannons couldn't penetrate Ice Thorn's walls, and Ice Thorn didn't care if its walls were penetrated; all it cared about was crashing into it.

Polaris circled from the south side of The City-State to the rear.

The damaged outline of iron wall appeared on the radar screen.

Zhao Tiezhu had already retreated iron wall to one point eight kilometers directly behind The City-State.

Polaris stopped at a position one point five kilometers directly behind The City-State.

The City-State's massive eight-hundred-meter-long body blocked the front.

Looking from this angle, Black Rock City-State was just a one-hundred-fifty-meter-high steel wall.

"City-State Lord Lin Xiao! Polaris has arrived at one point five kilometers directly behind The City-State."

"Copy that!"

Lin Xiao's voice was mostly drowned out by the full-power roar of the engine.

"What about Zhao Tiezhu?"

"iron wall is three hundred meters behind me."

Zhao Tiezhu's voice came through.

"Good! You are all behind!"

Lin Xiao gasped for air, heavy and dull.

"Zhou Yuan! How far is Ice Thorn from my front?"

"Two kilometers! Speed twenty-five! Relative speed thirteen! Impact expected in nine minutes!"

The speed had increased by another kilometer.

Ice Thorn's engine was running at 140% overload power, and the metallic screeching could be heard from two kilometers away.

"City-State Lord Lin Xiao."

Lu Chen's voice rang out in the communicator.

"What?"

"What is the blast radius of six tons of explosives?"

Lin Xiao was silent for a second on the other end of the communicator.

"The technical parameters of The City-State armory show that the effective kill radius of six tons of standard industrial explosives in a confined space is one hundred fifty meters! One hundred meters in an open space."

"But that's standard industrial explosives."

"If Ice Thorn is using high-energy military explosives from the pre-civilization, the effective kill radius could double or triple."

"Tripling it would be three hundred meters."

"Your The City-State is four hundred meters wide."

"Correct."

Lin Xiao's voice dropped to its lowest.

"A three-hundred-meter radius against a four-hundred-meter depth! In theory, the one-hundred-meter area at the rear will only be affected by the attenuated shockwave."

Lu Chen glanced at the vehicle speed.

Polaris was traveling in the same direction as Black Rock City-State, maintaining a distance of one point five kilometers from the rear wall of The City-State.

"What is the degree of damage to the front wall of The City-State from a frontal detonation of six tons of explosives?"

Lin Xiao's voice floated in the background noise of the communicator for three seconds.

"The front wall will be completely destroyed."

"What about the second layer?"

"Large-scale collapse."

"What about the third layer core defensive wall?"

"I don't know."

Lin Xiao's voice sank to the bottom of his throat.

"The third layer core defensive wall of Black Rock City-State has never been hit head-on by six tons of explosives."

"There is no precedent."

"Correct! No precedent."

The communicator was silent for two seconds.

Ice Thorn's voice came through on the public frequency again.

"Lin Xiao."

"One point five kilometers left."

"You have six minutes left."

"After six minutes! You and everyone behind you! Will all turn into fragments."