Standing beside the large door, the two used the same method as before to open it again.
As soon as the door creaked open, fresh air from outside, along with the outdoor light, poured into the tunnel. Lin Yu felt his mind clear considerably.
However, there seemed to be zombies outside as well, because Lin Yu and the others heard the sound of zombies shuffling near the door.
That scraping, dragging sound against the ground could not possibly be human.
Lu Heng took out a mobile phone, turned on the recording mode, and then used vines to circle the phone and extend it outwards.
Sunlight was filtering in from outside, so the door should lead to the outdoor environment.
After recording for about two to three minutes, Lu Heng controlled the phone to return inside the door.
Through the recorded footage, they clearly saw the situation at the entrance.
Outside the door was a hollow in a mountainside, overgrown with various weeds. Perhaps the weeds had covered the location of the door, so there were no zombies at the entrance.
But the loud noise of opening the door had attracted a few zombies from a distance. However, after the sound stopped, the zombies lost their target and were wandering around somewhat aimlessly.
Further away, Lu Heng and the others were surprised to discover what appeared to be airplanes or similar objects. They couldn't see clearly because it was also overgrown with weeds, and the weeds were quite tall. The phone Lu Heng had just extended hadn't reached a very high position.
"Let's go out and take a look. Those things outside look like planes."
This was a military base, so if those were indeed planes, they would be military aircraft.
The two exchanged glances, Lu Heng nodded, and then he manipulated the vines to yank the door open. Lin Yu quickly conjured a floating ice shield in front of them.
Lu Heng looked at the ice shield with good clarity and praised Lin Yu beside him, "Well done. Let's get started."
This time, they didn't call out Lin Xue for help. If Lin Xue always gathered the zombies for them to kill, Lin Yu would never be able to train himself.
In fact, Lin Xue could be considered a bug, very effective against zombies. Lu Heng really wanted to see if Lin Xue could control the zombies to fight amongst themselves. If it were possible, bringing Lin Xue out each time would mean annihilating all the zombies without a trace.
"Lu Ge, what are you thinking about? Why does your smile look so lewd?"
Lin Yu's voice wasn't loud, but it did interrupt Lu Heng's daydreaming.
"Cough! Nothing, I was thinking about strategy."
"Oh, those zombies are rushing towards us. I'll take the lead and clear a path. Be careful yourself."
"Mhm." Lu Heng coughed awkwardly, smoothed his hair, and a circle of lightning balls enveloped him as he also gradually walked out of the mountain hollow.
Leaving the partial shelter of the mountain, Lu Heng and the others began to get a clearer view of their surroundings.
First, they used their wood-element abilities to clear the plants covering the area, improving their line of sight and preventing zombies from crawling in the grass for sneak attacks.
Lin Yu did the same; he also possessed wood-element abilities. So, under their control, all the weeds in the entire area were cleared, revealing the cement ground beneath.
Attracted by the scent of Lu Heng and Lin Yu, more and more zombies arrived. They ran and roared, their heavy bodies creating sounds on the ground that resonated with other zombies.
Fortunately, the number of zombies wasn't too large. After all, this was just a base, not a city with a dense population.
For a few hundred people, it would only take an instant for Lu Heng and Lin Yu to eliminate them with their current abilities.
Lu Heng followed behind Lin Yu, constantly watching him. If any zombies came from the flanks and Lin Yu missed them, he could deliver the finishing blow.
After clearing the weeds that obstructed their vision on the ground, Lin Yu once again condensed vines and formed a wall about half a person's height around himself. Outside this vine wall, the ground was also covered with about two meters of fine vines.
When the zombies stepped into the area covered by the vines, the vines frantically pulled at their bodies, immobilizing the charging zombies.
Seeing that most of the zombies were drawn to the vicinity, he opened his left hand towards the sky, enveloping the controlled zombies in ice bodies condensed by his ice-element abilities. The liquids within the frozen zombies turned into solid ice, and their entire bodies were thoroughly frozen.
Then, Lin Yu clenched his slender fingers into fists, and the bodies, frozen into ice spikes, instantly shattered into pieces, scattering frozen zombie chunks all over the ground.
Lin Yu looked at his masterpiece with satisfaction. This time, he didn't make a mess of splattered zombie fluids; the scene looked much cleaner.
After another round of this operation, looking around, within the military base enclosed by the iron fence, apart from a few scattered zombies in the distance that had no intention of coming over, most zombies had been eliminated by Lin Yu.
Lu Heng, following behind, had a much easier time. He didn't actively kill any zombies. Some zombies that were attracted to him were instantly blown into charcoal when they hit his lightning balls. As they fell to the ground, their bodies also exploded like charcoal, scattering black carbonaceous material everywhere.
"Hey, these are carbonized. Can they be used for starting a fire?"
As he thought it, Lu Heng unleashed his fire-element ability. A fire dragon swept through in a circle, and the charcoalized substances instantly ignited. However, the smell was quite unpleasant.
"Sigh, seems like they can't be used. After all, they're not carbonized plant matter, so they still give off an unpleasant smell when burned."
"Lu Ge, all the zombies are dead."
Lin Yu had cleared all the zombies within the military base enclosed by the iron fence. He had also swept the frozen zombie fragments together with vines and piled them up.
"Check if there are any damaged sections in the fence. If there are, use your earth-element abilities to patch the gaps. I'll go check those planes."
There were indeed quite a few planes here, and they were mainly transport aircraft.
Lu Heng inspected the planes parked on the ground one by one. Some planes still had cargo, but much of the cargo seemed to have been contaminated, with spray-like marks of liquid covering the cargo boxes.
Even so, Lu Heng didn't abandon those items. He opened the cargo boxes and put the clean items into his spatial storage. The contaminated boxes were dragged outside by vines to an open area.
The planes themselves were also inevitably splashed with some liquid, but Lu Heng couldn't clear these immediately. However, the planes couldn't be abandoned like those boxes.
These pre-apocalypse industrial products were already very rare at this time, even if they were disassembled into parts.
"Lu Ge, summon your Mungo. I'll go up and check the surrounding situation." There were quite a few planes and cars here. Lin Yu's spatial storage couldn't hold so many large items, so after circling the fence, he had nothing else to do.