Just as Feng Jun and Li Lu were conversing on the rooftop, a group of zombies was drawn to the vicinity by the sound of the explosion. Several zombies had already wandered near the buried Sawtooth.
The Sawtooth, originally crushed beneath the rubble, suddenly extended an arm from under the bricks and grabbed the nearest zombie. Countless red and black blood vessels extended from the Sawtooth's palm, piercing into the zombie's body. In just a few seconds, the zombie's flesh and blood were completely drained, leaving only a skeletal frame.
This was the Sawtooth's ability, 'Bloodsuck,' which allowed it to absorb the blood of any creature it caught to repair its own injuries. The Sawtooth, which had been reduced to a mere skeleton, immediately began to rapidly regenerate its flesh and blood, with some of its shattered bones even starting to heal.
Having regained its strength, the Sawtooth quickly broke free from the rubble and began to grab and devour the surrounding zombies. Feng Jun happened to peek out and witnessed all of this, seeing the Sawtooth rapidly recovering from its injuries by continuously devouring the surrounding zombies. Its bones and flesh were recovering at a visible rate, and in the blink of an eye, it had returned to how it looked when Feng Jun had first engaged it in combat.
"Holy crap, Prototype. Are you Alex Mercer?" Feng Jun couldn't help but exclaim as he watched, the zombie's ability was too similar to the protagonist's ability in Prototype.
"Roar!" A furious roar was Feng Jun's only reply. The Sawtooth kicked off the ground, directly leaping onto the wall and soaring towards Feng Jun's direction.
"Such terrifying regenerative power." Feng Jun, standing on the rooftop, launched another rocket. This time, the Sawtooth did not try to take the hit head-on, instead dodging Feng Jun's rocket with a sidestep.
Seeing the Sawtooth almost upon him, Feng Jun could no longer fire rocket launchers at such close range. He could only turn and flee. Fortunately, his mechanical exoskeleton had thrusters, and Feng Jun, not daring to prolong the fight, quickly escaped from his original position. Old Ba also followed behind him, fleeing together.
"Is this thing unkillable?" Feng Jun shouted to Old Ba, hoping to get some useful information.
"It has very strong regenerative power. As long as it absorbs even one zombie, it can recover a lot. Cough, cough~ I once set a trap and blew off half its body, but it only absorbed two or three zombies and recovered. Ugh~" Li Lu's voice came from Old Ba's mouth, sounding weak and accompanied by coughing and retching.
"Are you okay?" Feng Jun had already heard that Li Lu's current condition was very weak; she might have suffered very serious injuries.
"You'd best be able to inflict enough damage on it all at once, otherwise this Mutant will only continue to recover and evolve. Every time it recovers from damage, it will grow a little stronger. The longer this drags on, the more disadvantageous it will be for you..." Before Li Lu could finish this sentence, she lost contact.
Calling out several times, Feng Jun received no response from Li Lu. It seemed her situation was very dire. By this time, the Sawtooth had climbed onto the rooftop. After a glance at Feng Jun, it locked onto her position and lunged.
Feng Jun was already prepared, and he and Old Ba leaped together towards another building. At the same time, he waved his hand and directly threw over thirty high-explosive grenades from his storage space, sending them smashing towards the Sawtooth.
The explosion generated by over thirty high-explosive grenades engulfed the Sawtooth's body, even collapsing several floors of the building beneath it. Feng Jun and Old Ba took the opportunity to put more distance between them.
"Go find your master quickly, and bring her back." Feng Jun shouted loudly at Old Ba. The robot dog tilted its head, seemingly not hearing clearly due to the loud explosion.
Helpless, Feng Jun could only continue to create distance while yelling at Old Ba again. However, the dog seemed not to understand Feng Jun's words, continuously circling around Feng Jun and refusing to leave.
The dense smoke from the grenade explosion had dispersed. The Sawtooth had only suffered a superficial injury; its muscles rippled, and the wounds quickly healed and vanished.
"Its defense has gotten stronger." Although Feng Jun had not been in the Doomsday for long, and had never encountered weapons before this, the power of over thirty high-explosive grenades detonated by Feng Jun at once was definitely stronger than a rocket launcher. Yet, such an explosion only caused a superficial wound to the Sawtooth, not even exposing its bones.
Before Feng Jun could aim his gun again, two floor slabs were thrown at him by the Sawtooth. Feng Jun had no choice but to use his thrusters to dodge, but as soon as Feng Jun landed, two more floor slabs came smashing towards him.
After evolving into a Mutant, the Sawtooth had gained a certain level of intelligence. This small creature in front of it made it extremely agitated. Such a weak creature could be killed with a single slap, yet this one continuously injured it, and it couldn't catch him. However, it also noticed that Feng Jun's marksmanship wasn't very good; he always had to stop moving to attack it. So the Sawtooth seized the gaps in Feng Jun's movements, continuously throwing things at Feng Jun while approaching him, preventing Feng Jun from aiming at itself.
"This damn thing, it's quite smart." Feng Jun dodged the architectural debris thrown by the Sawtooth while constantly leaping between rooftops to create distance, which made it impossible for him to stop, aim, and shoot.
Although Feng Jun was wearing a mechanical exoskeleton, each time the mechanical exoskeleton activated its thrusters, it consumed a certain amount of fuel. Several consecutive leaps had already consumed half of the fuel carried by the mechanical exoskeleton. If the fight continued like this, it would only be a matter of time before the Sawtooth caught up to him.
The Sawtooth had by now adapted to moving on the rooftops, and without Feng Jun's interference, it quickly closed the distance between them. Seeing the Sawtooth rapidly approaching, Feng Jun had no choice but to give up on continuously bombarding it with his Bolter and rocket launcher. He could only turn and focus on escaping, resorting to harassing the opponent with his shoulder-mounted rocket launcher and laser cannon.
The Sawtooth was getting more and more excited as it ran, seeing that the distance between itself and Feng Jun was constantly shrinking. It couldn't wait to tear open his belly and suck his fresh blood dry.
Twenty meters, ten meters, five meters. The mecha's system continuously alerted Feng Jun that the enemy behind him was rapidly closing in. But this was already Feng Jun's fastest speed, and the laser cannon and miniature rockets on his shoulders were simply unable to slow the Sawtooth's pace. Seeing the distance closing little by little, Feng Jun felt a bead of sweat trickle down his back.
The Sawtooth excitedly opened its massive mouth, filled with dense, sharp fangs that extended from its lips deep into its throat, like an abyssal maw. With a sudden burst of power from its thighs, the Sawtooth's speed increased another notch, and its outstretched giant claw had already reached the exoskeleton on Feng Jun's back.
At that very instant, Old Ba, who had been following nearby, suddenly turned and lunged straight for the Sawtooth's head. The Sawtooth's attention was entirely focused on Feng Jun at this moment, and it hadn't noticed Old Ba lurking nearby. Caught off guard, its entire left half of its face, along with its left eye, was completely torn off by Old Ba.
Although the Sawtooth possessed terrifying regenerative abilities, it did not mean it was immune to pain. Earlier, no matter how Feng Jun bombarded it, it consciously used its hands to protect its head. Now, with its entire left face and left eye bitten off by Old Ba, and its eyeball ripped out, pulling a string of optic nerves with it, it roared in agony on the spot.
"Good dog, well done." Feng Jun took the opportunity to put some distance between them again, then pulled out his rocket launcher from his storage space and fired a shot at the Sawtooth.
However, the Sawtooth did not stay put. Upon hearing the sound of the rocket launcher firing, it sidestepped to the right, dodging the rocket's attack. After a long period of combat, it had adapted to Feng Jun's attack patterns. Just then, Old Ba lunged from the right, ready to seize the opportunity to bite off its left eye. But just as Old Ba was about to bite, the Sawtooth's right hand suddenly accelerated and grabbed Old Ba's hind leg.
Old Ba, whose hind leg was caught, was immediately lifted by the Sawtooth, raised high above its head, and slammed down. It was smashed against the rooftop several times, before the Sawtooth lifted Old Ba above its head again, directly tearing off one of its hind legs, and then casually throwing it off the building.
Feng Jun didn't have time to react, watching Old Ba being thrown off the building by the Sawtooth. Although Old Ba was just a robot dog, it had at least been helping him draw fire. Now without Old Ba, he would have to face the Sawtooth's pursuit alone.
At this point, only Feng Jun and the Sawtooth, two humanoid creatures, remained on the rooftop. The Sawtooth stared intently at Feng Jun with its sole remaining right eye. There were no zombies on the rooftop for it to absorb blood from, so its left eye could only recover slowly.
Feng Jun checked the remaining fuel in his mechanical exoskeleton; it was less than 20%. Continuing to flee was impossible. The only thing he could hope for now was that his few guards had already discovered his disappearance and could bring people over as quickly as possible. Or, he could directly cross back to the present world and return in a few days. However, if he did that, Li Lu would be in danger. Injured, she was currently hiding somewhere nearby, and if he left directly, she probably wouldn't last long.
The Sawtooth extended its tongue and licked its lips. It was already impatient to enjoy the delicious meal before it. Compared to the blood of zombies and Mutants, it preferred these weak creatures. Although they had many hard-to-swallow bones, as long as it tore open their internal organs, the fresh blood surpassed any creature it had ever eaten.
With an acceleration that shattered the floorboards beneath its feet, the Sawtooth's speed increased once more. Feng Jun's vision, even after injecting the evolution serum, could barely keep up with its movement speed. Aided by the exoskeleton's evasion system, Feng Jun flashed aside, dodging the Sawtooth's pounce. The retractable dagger on his right arm sprang out, directly stabbing into the Sawtooth's thigh.
The Sawtooth cried out in pain, and its right leg kicked out rapidly. Because the distance was too close, Feng Jun couldn't dodge and could only put his hands on his chest, taking the full force of the blow. This kick directly sent Feng Jun flying onto the rooftop of the opposite building. Feng Jun's arms were numb from the impact; if it weren't for the mechanical exoskeleton blocking the blow, he would have been directly kicked to death.
Drip, drip, drip~ The mechanical exoskeleton issued a damage alert; the right arm and the jet propulsion device on the back had been damaged in the recent impact.
With an effortless leap, the Sawtooth landed in front of Feng Jun. Looking at its immobile prey, it opened its gaping maw, intending to swallow Feng Jun whole.
"Die, you bastard!" Feng Jun raised his left hand, activating the storm magazine on his left arm. At such close range, the Sawtooth had no way to dodge. Five hundred miniature projectiles poured into the Sawtooth's mouth, directly piercing through its skull.
But to Feng Jun's despair, even with a clear hole shot through its head, the Sawtooth still didn't stop moving. The muscles around the wound in its mouth continued to Creep and repair themselves; a shot through the brain was not a fatal injury to it.
"An immortal creature? I'm starting to suspect Prototype was modeled after you." Feng Jun suddenly spread his arms and stepped forward, embracing the Sawtooth's body tightly.
"Beep! mechanical exoskeleton locked." The mechanical exoskeleton's limbs firmly locked onto the Sawtooth's body.
Feng Jun directly activated his Crossing ability, and his entire person vanished from within the exoskeleton. However, the exoskeleton's right hand still clutched an orange-yellow cylindrical object, its countdown numbers rapidly ticking down.