Lin Yu took a few steps back. He could also control plants, so he imitated Lu Heng and sent out some vines to probe into the gap that Lu Heng was slowly opening.
"Then you can explore here. Use your vines to feel it. The touch will be different when those zombies come into contact with them."
Although zombies were humans who had already died to humans, their bodies still contained fluids similar to blood. Although the flow had stopped, when they were hacked, that kind of fluid would still erupt and splash everywhere.
Therefore, although the zombies' skin was cold, their bodies still had a certain softness and were not overly stiff.
Lin Yu nodded and released slightly thinner vines, exploring inward along the gap that had just been opened.
In fact, the sound of the lock being disengaged when the large door was opened had already alerted the zombies on the other side of the door, but they might not have been near the door.
So, when the door was opened a crack, many heavy footsteps could be heard running towards them rapidly, occasionally mixed with the roars of some zombies.
Lu Heng only controlled the vines to cover both the inside and outside of the large door, so that he could make up for it immediately if Lin Yu made a mistake later.
Lin Yu controlled the vines to spread out on the outside of the door. While feeling the environment outside, he whispered to Lu Heng, "It seems to be a tunnel outside as well, because the vines quickly touched the surrounding walls and continued to extend upwards."
"Yes, that's right. See if you can sense the size of the tunnel."
"It's the same as the passage we entered from earlier, but it's a bit messy inside. The vines have touched many obstacles."
"It might be abandoned cars."
Lu Heng had seen cars abandoned in the tunnel in the recording earlier, but since Lin Yu hadn't encountered any zombies yet, Lu Heng felt that the obstacles he had sensed should not be the ones in the recording. Judging from the environment in front of and behind the car in the recording, it should be in the middle of the tunnel.
The sound of zombies running was getting closer and closer, and their roars were amplified countless times in the open environment.
Lin Yu continued to control the vines here, "Damn it, Brother Lu, I've grabbed the zombies' bodies."
"So many zombies, but I don't know how many."
Even if this stage of zombies had only one leg, they could still run fast on the ground while crawling. Therefore, it was understandable that Lin Yu couldn't distinguish them by grabbing them with vines.
Lu Heng looked at Lin Yu's focused expression and couldn't help but smile. He controlled the vines to wrap around a metal rod and probed it into the gap of the metal door in front of him. Immediately, the sound of metal clanging echoed outside.
Lin Yu was startled and suddenly looked up at Lu Heng, not understanding.
"Heh heh, let's stimulate the zombies outside and get them to come over quickly. Just fix the zombies in one place. When it gets bright outside later, we'll harvest them."
Lin Yu nodded and continued to control the vines diligently, sensing the zombies outside.
At this time, about a hundred meters away from the metal door, the ground was covered with vines. Moreover, Lin Yu was careful and also laid vines along the rock walls of the tunnel upwards, covering this hundred-meter distance without any blind spots.
"Damn it, Brother Lu, there's a zombie on the ceiling of the tunnel. It climbed over from above."
Lu Heng was also surprised to hear this. Logically speaking, zombies that had not advanced should not be able to climb. Zombies at this stage should not have evolved to be able to climb walls. Otherwise, if they had encountered zombies that could climb walls in Dragon City and Pingcheng a few days ago, the city would definitely not have waited for Lu Heng's support.
"Well done."
It seemed that Lin Yu had laid vines covering the entire tunnel, including the top, which was why he had caught this climbing zombie.
If he himself had been laying vines there, he might not have thought of covering the top of the tunnel.
After waiting for a while longer, and no more heavy footsteps of zombies coming from a distance were heard, Lu Heng then controlled the vines outside the door and placed several searchlights. "Let's go, open the door and see how many we've caught."
The vines on the door exerted force, and the two heavy metal doors were instantly pulled open. Lu Heng controlled the vines to turn on the searchlights, and the scene not far away instantly entered the eyes of Lu Heng and the two of them.
"Wow, there are quite a lot here. Hurry up and kill them. There's nothing much to see with these things."
Lin Yu looked at the pile of zombies accumulated a hundred meters away. They were mixed with vines, piled up together, blocking nearly half the height of the tunnel.
Without hesitation, Lin Yu controlled the vines to kill the zombies one by one. The tips of the vines became incredibly hard and pierced the zombies' heads, causing the red and white fluid in their brains to splash out, flowing down their bodies to the ground.
"Sigh, I still find this a bit disgusting every time I see it. If only there was a less violent way to kill them."
Lin Yu collected the zombie crystals into his storage ring, then piled the completely dead zombie corpses to one side of the tunnel, leaving a width wide enough for a car to pass.
"Ice-element abilities would be cleaner. Freeze all the zombies, then pierce their heads. That way, it won't get everywhere."
However, that would also consume more energy, and low-level ice-element ability users simply couldn't do it.
"Brother Lu, why didn't you say so earlier? I always see you killing zombies with vines, and I thought this was the most convenient and fastest way."
Lin Yu also happened to have ice-element abilities, and he was already a thirteenth-tier ability user. Coupled with the Qi-replenishing pills he refined himself, there was no such thing as energy depletion.
"I don't find this disgusting, but it also shows that you really lack practical combat experience. Since you have multi-element abilities, you should leverage your advantages in combat. In different environments, you should adjust in time what abilities to use.
Vines are not without their benefits. At the very least, in terms of exploration, I feel this skill is the most practical. It can reach the enemy's side silently."
Lin Yu pondered for a moment and agreed with Lu Heng's words. Indeed, his lack of practical combat experience led him to only imitate others and be too limited in combat.
If he only had wood-element abilities, he would have nothing to say, as there would be no other choice.
Since he had three types of abilities, he really couldn't use only one type in every battle.
Lu Heng's suggestion of using vines for reconnaissance was indeed the best choice. If he had used ice-element abilities from the start, it wouldn't have mattered for the unconscious zombies, but sometimes the abnormal low-temperature environment of ice-element abilities could easily expose him when fighting humans.