The overwhelming frenzy of monsters rushed towards the office building without fear of death, and they exuded a terrifying aura, and a deafening roar resounded throughout the prison one after another.

Tang Zheng and Yang Yueying were busy activating the broadsword grenade that had been placed on the second floor.

After activating the last broadsword grenade, Tang Zheng turned his head and said to Yang Yueying beside him: "You go and activate the broadsword grenade on the third floor to pick me up, and I'll go to the first floor to guard for a while and see if I can get some supplies on the monster." ”

Yang Yueying said worriedly: "This is too risky, there are so many monsters, how can you defend it alone." ”

Tang Zheng patted a box of fragment grenades next to him, and then smiled and comforted Yang Yueying, who was worried: "Isn't there it, besides, if we don't take some risks, how can we resist so many monsters outside." ”

Yang Yueying wanted to say something, but Tang Zheng urged her: "Go quickly, don't worry about me, hurry!" ”

Yang Yueying gritted her teeth, then turned around and ran towards the stairs on the third floor.

"Stinky boy, you said you would protect me in the future, if you dare to experiment, you just wait!"

Tang Zheng laughed helplessly a few times, and then he picked up the withered butterfly knife in his hand and rushed downstairs quickly.

When Tang Zheng arrived on the first floor, the vanguard of the monster frenzy had already rushed into the corridor on the first floor.

They saw Tang Zheng, who had just arrived downstairs, his scarlet eyes flashed with a strong bloodthirst.

They roared loudly, scrambling to rush at Tang Zheng viciously.

The corridors of this building are not narrow, and there is a gap of a few inches wide when three or four people walk side by side.

But for those monsters, this width of the corridor is obviously not spacious enough, and the monster's physique is originally larger than that of humans, so three monsters can block the corridor to death.

The first three or four monsters rushed in side by side in the narrow passage, struggling towards Tang Zheng, but the crowded corridor greatly limited their speed, so Tang Zheng had enough time to open the box full of fragment grenades.

Tang Zheng pulled out the pull pin of a grenade, and then threw it at the crowded monster group in front of him.

"Boom!"

After about two or three seconds, the grenade that was thrown out by Tang Zheng turned into tiny steel balls and burst out in all directions after emitting a huge explosion.

The monsters closest to the grenade let out a scream when the grenade exploded, and then fell to the ground.

While their bodies were trampled into flesh by the companions behind them, Tang Zheng's experience points increased a lot.

Tang Zheng, who tasted the sweetness, hurriedly sounded the grenade again, without exception, every time the explosion of a grenade sounded, Tang Zheng's experience value increased by a large margin.

Soon, Tang Zheng's mind sounded with the emotionless mechanical voice of the Apocalypse System.

"Congratulations on the upgrade! Current Host Level: Lv6! ”

Feeling that his body had become a lot stronger again, Tang Zheng licked his lips with some excitement, he looked at the more than half a box of fragment grenades beside him, and hurriedly grabbed them again and pulled them one by one.

Hundreds of monsters would not be able to catch Tang Zheng's body for a while, and every time there was an explosion, Tang Zheng's experience points would rise.

With the subsequent explosion of a grenade, Tang Zheng's level has been raised to Lv7.

As the sound of the Apocalypse System fell, Tang Zheng's body was strengthened again.

Feeling the much stronger body brought about by the upgrade, Tang Zheng nodded with satisfaction.

The monsters were still rushing towards Tang Zheng one after another, and the death of their companions in front did not let them learn any experience from their low intelligence, and it was still you squeezing me and I squeezing you towards Tang Zheng.

And Tang Zheng, who used up all the fragment grenades, ran to the second floor with a girl, and he didn't fight those monsters because his strength was improved.

Tang Zheng took the withered butterfly knife and ran to the staircase leading to the third floor at the fastest speed.

There was a stun bomb that Tang Zheng had prepared a long time ago.

When Tang Zheng opened the box containing the stun bomb, the pregnant people finally rushed towards Tang Zheng by rubbing the ashes against the wall.

Unlike a fragmentation grenade, a stun bomb is a riot weapon rather than a military weapon, so its role is not how to kill the enemy, but to make the enemy incapacitated by the strong light and pressure fluctuations caused by the explosion.

The previous fragment grenade on the first floor was to be able to kill and injure those monsters while increasing Tang Zheng's level and combat effectiveness.

And now the detonation bomb prepared on the second floor is the one that Tang Zheng prepared for the materials that he and Yang Yueying will urgently need next.

Tang Zheng, who has experience in his previous life, knows that in the era of the end of the law, only by killing monsters by the survivors themselves can they obtain the corresponding experience points, and there is no limit to the methods used by the survivors to kill monsters.

And if the monsters are killed by the survivors with weapons exclusive to the end of the era, then after killing the monsters, the killed monsters have a certain probability of dropping various materials and items.

Therefore, this is also the fundamental reason why Tang Zheng killed so many monsters with fragment grenades before, but not a single material was dropped.

Tang Zheng didn't think about what props and resources he could get on the first floor, according to his plan, the first floor was used to upgrade and improve his strength, and the second floor was to use the shock bomb to weaken the combat effectiveness of the monsters, and then use the withered butterfly knife to kill those monsters to get the props and resources needed by the next club.

Tang Zheng didn't know this rule in his previous life, which led to his previous life, like most people, who was seriously short of supplies in the era of the end of the law, and finally died tragically under the claws of those monsters.

The monsters approached Tang Zheng more and more, and with a few muffled sounds, the few monsters that rushed to the front were blown to pieces by Tang Zheng's broadsword grenades that they had placed earlier.

Even the monsters behind them who were relatively close were scarred by the massive amount of fragments from the explosion of the broadsword mine.

At this time, Tang Zheng pulled the safety bolt of the stun bomb and threw it hard behind the seriously injured monsters.

With a dazzling bright light, Tang Zheng raised the withered butterfly knife to bypass the few broadsword grenades placed in front of him, and slashed at the few monsters that were already seriously injured.

Those monsters were already seriously injured by the fragments of the broadsword grenade, and Tang Zheng's strength was greatly improved after two upgrades.

After a while, the monsters were hacked to death by Tang Zheng, and then two items fell from the corpses of two of the monsters.