Then, the operation to burn everything to ashes began.

Half an hour later, after witnessing the complete eradication of the Tier Three Pollution Source, Bai Ye ordered everyone to continue clearing out the remaining mutant monsters on the basement's third level.

Then she turned towards the exit and headed back to the surface.

In the battle against the Tier Three Mutant, her condition worsened significantly, especially in terms of superpower consumption, which was nearing a critical level.

Fortunately, in the end, Lin Feng didn't let her down.

...

Back on the surface, Lin Feng and his companions first took a walk outside, basking in the sun to burn off the mutant's blood and flesh on their bodies, avoiding genetic pollution.

Afterwards, they took off their battle armor and returned inside the cave.

Waiting for the return of the Salvation Army Leader Bai Ye.

Lisa, who was researching the Rock-Horned Horse nearby, began to entertain Lin Feng and his companions.

Chen Shanshan saw her recording the habits of the Rock-Horned Horse and studying the food ratio, and then suggested:

"Ding Yi also has related research. You two can discuss it sometime."

Lisa's eyes lit up:

"Really? I'll go right after this."

At this moment, Shen Yue came from outside and handed a cloth bag to Lin Feng.

Taking the heavy cloth bag, Lin Feng opened it to find nine high-energy batteries inside.

They were used to power power armor, relics left from the prehistoric Old Earth era.

As for these nine, they were the only valuable equipment salvaged from the Late Tier Two Corruptor that Chen Shanshan took down with the Demon-Extinguishing Holy Flame.

The Exoskeleton Power Armor, in its wear and tear by the Corruptor, had a durability of about five.

After Chen Shanshan shot its head with the Demon-Extinguishing Holy Flame twice more, it was completely scrapped.

Root damage cannot be restored to its original state by consuming Life Value with the upgrade system.

Fortunately, the high-energy batteries on the back of the power armor, though somewhat depleted, were still usable.

Moreover, this former one-star hunter, an early Tier Two evolver, wore a generic power armor type, and the batteries matched those held by Lin Feng's squad.

Hence, Lin Feng instructed Shen Yue to remove the armor batteries from the headless corpse in advance as spoils of war.

Under Lin Feng's promise of two pounds of Mid-Term Evolutionary Meat as an inducement, Shen Yue endured the stickiness and collected the nine high-energy batteries, taking them outside for sun exposure to remove the mucus and mutant pollution.

After all, among everyone present, only she possessed the Power of the Holy Spring, having absorbed a large amount of Holy Spring Water to complete her evolution, her body coursing with rich Holy Spring Blood.

As long as the pollution wasn't severe, ordinary skin contact wouldn't be a big problem, especially with a layer of glove protection.

Now, with nine high-energy batteries in hand, Lin Feng took them out one by one to examine their quality and condition.

The good news was that none of the nine batteries were scrapped. The bad news was that the durability of all had dropped below six and required the consumption of nine Life Values to repair.

After restoring their durability one by one, Lin Feng put these batteries away, waiting for Bai Ye's return.

Soon, a slim woman emerged from the nearby underground shelter entrance.

Bai Ye finally appeared, her face showing a hint of fatigue under the sunlight.

Fighting the Tier Three Mutant wasn't an easy task for her, especially since her awakened spatial superpower wasn't combat-oriented, inherently weaker in combat capability.

Returning to the camp, Bai Ye instructed Lin Feng and others to stay calm first; she would return after a quick wash.

She entered a large RV, and ten minutes later, a refreshed Bai Ye emerged, wearing a loose short sleeve paired with long pants and a pair of slippers, presenting a lazy and leisurely look.

However, the belt filled with insulated bottles remained with her, carried at all times.

Bai Ye walked under the tent where everyone was, took out an insulated bottle from her waist, and handed it to Lin Feng.

Seeing their slightly terrified and puzzled expressions, Bai Ye smiled and spoke slowly:

"You needn't worry, there's no liquid hydrogen inside, just an ordinary insulated bottle, but it's filled with the Tier Two Life Source Material of the Clan Leader Level Rock-Horned Horse as promised to Captain Lin."

Raising an eyebrow, Lin Feng picked up the insulated bottle from the table, scanned it to ensure there were no issues, then opened it.

A dense essence surged out, as if directly punching Lin Feng in the face.

The magnitude of the Tier Two Life Source Material far surpassed the concentration during Tier One Evolution.

The difference in life levels between the two was evident.

As he closed the bottle cap, Lin Feng even faintly heard the mighty roar of the Clan Leader Level Rock-Horned Horse in the source material, embodying the resilient life force of the Rock-Horned Horse.

After confirming everything was fine, Lin Feng immediately asked the beautiful yet lazy woman in front of him about the doubt he harbored:

"If Leader Bai can evolve to Tier Three and become a Tier Three King, can the spatial superpower then extract the source material from Tier Three Evolutionary Meat?"

Bai Ye knew he would keep pondering about Tier Three Evolution issues, so she was well prepared.

Though Lin Feng, having chosen the Rock-Horned Horse evolution path, had his evolution limit in this life at Late Tier Two.

But this is only the current limit of the Rock-Horned Horse tribe.

Because a Tier Three King has yet to emerge from the Rock-Horned Horses.

While Lin Feng couldn't absorb the original source material of other Tier Three desolate beasts to achieve Tier Three Evolution, he had another path, albeit with nearly zero hope.

To evolve to Tier Three on his own, becoming the Rock-Horned Horse's first Tier Three King.

Though difficult, it is not impossible.

The key lies in acquiring pure Tier Three Life Source Material, a substance that can elevate any Tier Two cells to transform into Tier Three.

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