Doomsday: with unlimited warehouse system

Suddenly, as David approached a corner of the laboratory, a large operating table in front of him instantly caught his attention. "There's even an operating table? How strange."

At the same time, as David approached the table, he noticed that something seemed to be lying on it. Upon closer inspection, David realized that it was not a person lying on the table, but a corpse of a zombie. Moreover, the zombie's body appeared to have been dissected by someone, with cuts covering various parts of the body, and certain parts had even been severed and neatly placed aside.

Examining the neatly arranged pieces of flesh and missing organs, David once again found himself puzzled. He never expected that there would be people dissecting zombies in this world. In the previous world, he had heard from some survivors that there were scientists who hired supernaturals to capture zombies for the purpose of conducting dissecting studies in search of a powerful energy source.

However, this claim had always been regarded as a rumor, and no scientist had ever successfully extracted energy from a zombie. So, David looked at the dissected zombie with a faint shake of his head, then prepared to turn and leave. But just as he was about to turn away, he suddenly felt a faint energy fluctuation in the void. Although the energy was weak, David, being a spatial ability user, was able to sense it.

This made David immediately stop in his tracks and look back at the zombie on the operating table. "What's going on? How can there be energy fluctuations? Where is it coming from?"

Approaching the table, David carefully examined the zombie's body and the surrounding area, filled with curiosity. Just as he approached the corpse, he sensed an even stronger energy fluctuation. "Wow, it's coming from the zombie's body?"

"Could it be that there is really some mysterious energy contained within the zombie's body?" Now David was completely interested. He carefully observed the zombie's body and concluded that it was a low-level zombie.

At this moment, all four limbs of the zombie had been severed, and some rotten organs had been cut out. Only the heart remained intact. David leaned closer to the heart, focusing his senses. As a spatial ability user, he could clearly perceive any energy fluctuations in the surrounding space. At the moment he approached the zombie's heart, he could distinctly feel waves of concentrated energy emanating from within.

"This is it!" exclaimed David excitedly. Although he didn't yet know how to harness this mysterious energy, he felt a surge of inexplicable excitement. After thinking for a moment, David activated his spatial blade. Since the corpse was already in pieces, another cut wouldn't make a difference.

The spatial blade shimmered with faint light as David carefully sliced through the heart of the corpse. After a few minutes, he successfully extracted the heart from the body. As he looked at the heart, David furrowed his brows. He realized that the heart showed no signs of decay, and even the blood vessels on it were clearly visible. If it weren't for the fact that David had personally dug it out from the zombie's body, he would have believed it was a normal human heart.

As he looked at this peculiar heart, David instinctively reached out and touched it with his fingertip. As soon as his fingertip made contact with the surface of the heart, he felt a warm sensation, which spread slowly from his fingertip to his arm and then throughout his body.

Soon, the warm sensation began to intensify, and it seemed to flow through David's veins and acupoints, causing them to tremble.

"Energy, it's really energy!" Feeling this sensation, David suddenly opened his eyes and exclaimed excitedly. As a Level 6 ability user, his perception of energy far surpassed that of an ordinary person, so he immediately recognized it as energy.

Just then, the voice of the system also sounded in David's ears.

[Ding! Congratulations, host, on leveling up to become a Level 7 ability user!]

"What? Leveled up again?" Hearing the voice of the system, David shouted in excitement. He didn't expect that this inexplicable power would directly bring him a level upgrade. But before the system's voice disappeared, it continued to sound in his ears.

[Ding! Congratulations, host, on acquiring one Primary Crystal!]

[Congratulations, host, on triggering a hundredfold critical hit and obtaining one hundred Primary Crystals!]

[Ding! Congratulations, host, on acquiring the attack-type ability—Decay!]

"A new ability? And it's in the attack category?" David was instantly bewildered. He knew that he was an awakened spatial ability user, and according to common sense, an ability user could only awaken abilities within a single category. So why did he suddenly gain an attack-type ability?

The system seemed to understand David's confusion and immediately explained.

"Because the host sensed energy obtained from the enraged zombie, it activated the host's second ability slot."

"In the future, different ability slots will be activated based on the source of energy obtained by the host."

"Note: Up to three ability slots can be activated, and later on, it is possible to stack the same type of ability slot."

Upon hearing the system's explanation, David suddenly realized. It turned out that different energy sources could activate different ability slots for the ability user. Since his previous awakening of abilities was related to a spatial zombie, the first ability slot he activated was for the spatial category. Now, because he came into contact with the corpse of an enraged zombie, naturally, the ability slot activated was for the combat category. Once he understood, he inquired about the function of the ability [Decay].

[Ding! Answering the host!]

"This ability is the ultimate skill of the enraged zombie. When activated, any object touched by the host will decay completely within thirty seconds!"

"After use, there is a cooldown time of ten seconds, which will gradually decrease based on the host's level."

"Wow! Any object? Does that mean there are no limitations?" Understanding the implied meaning behind the system's words, David clenched his fist tightly and said excitedly.

For David, this was already an incredibly powerful attack-type ability. When combined with his spatial gate, he could freely attack any enemy. Judging from the name "enraged zombie," David felt that this skill must have significant power.

With these thoughts in mind, David decided to experiment and test the extent of its power.

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