Avatar The Last Airbender and Prototype crossover.

This is a different Jake.

Book I – Water

Chapter II – Southern Air Temple

Katara and Sokka had no love for the Fire Nation. They were the reason why their mother was gone, possibly dead. They wanted this war to end but they didn't want the slaughter of them.

Aang was taught that all life was sacred. Meant to be treasured and preserved. That was the way of the Air Nomads, peaceful and pacifists. He knew that the Fire Nation was the cause of these hardships but that didn't mean they should die.

Horribly.

Apparently, this Jake had no problems with murder.

When Jake walked to them, the three got into their combat stances, ready to fight him. Katara with her waterbending, Aang with his airbending, and Sokka with his boomerang.

Jake scowled at this. He just saved them and this is how they repay him? "What are you doing?"

"Why did you kill them?" Aang demanded. "They were people too!"

Jake was about to retort when they heard a groan. They looked to the side and to Jake's amusement and the three's shock, a Fire Nation soldier was lying on the ground.

"Ugh." He looked up and immediately regretted it once he locked eyes with the monster that killed his comrades. His eyes were crimson red and he had this malicious smirk on, like he's thinking of a way to kill you in the longest and worst possible way.

Katara saw the way Jake looked at him and got between him and the soldier. "Jake, you already killed at least a dozen of them."

"So?" He walked passed her and picked up the soldier. "It's not like the world'll miss them. I sure won't." Jake gouged out the man's eyes and poured in hot flames into his sockets.

As he roasted from the inside out, Jake looked over to the horrified trio. "I know that you're leaving for the Northern Water Tribe to train. I want in."

Katara was shocked, how did he found out? "How do you know?"

Jake smirked. "Let's just say I know more than you let on." He threw the roasted body to some hungry wolves and they began to devour it.

The next day, Katara, Sokka, and Aang were saying goodbye to Gran-gran for their journey.

"We won't be long. We'll end this war." Sokka said enthusiastically and Katara nodded.

Gran-gran smiled and kissed her grandchildren's foreheads. "I know you will, please be safe."

Aang saw this and couldn't help but smile. He looked over to Jake who was brooding in the sun. Just thinking about what he did yesterday gave Aang the chills.

'Death.' Aang heard a ghostly voice that made him jump. What was that?

"Hey Aang, you okay?" Katara asked.

"Uh, yeah. Just nervous, I guess." Aang scratched the back of his head as they walked towards his sleeping bison.

"You sure he can fly?" Sokka was a little disbelieving of a bison could fly. That thing looked like a giant and it could fly?

Aang nodded his head proudly. "Yeah, just you wait, we'll be flying towards the skies before you know it."

"It had better be." A cold voice rumbled and they jumped when Jake was in front of them. After he demonstrated what would happen if they left him to his boredom, they were instantly inclined to let him join.

They didn't want what happened to the Fire Nation to happen to their tribe.

Despite the scare, Aang smiled at him like he hadn't witnessed his brutality. "You bet, c'mon!"

They climbed aboard Appa who was a little uneasy to have a literal monster on his back. But after some calming down from Aang and Katara, and some silent words from Jake, he got the message.

"Northern Water Tribe, here we come!" Sokka pointed south and Jake sighed.

"North's that way."

Sokka face palmed and turned around. "Northern Water Tribe, here we come!"

"Appa, yip-yip!" Aang shouted and Appa rose up on his feet and Sokka and Katara looked excited.

Appa was about to jump into the skies like Aang said but much to the two's dismay, Appa just plopped down into the water.

"Congratulations, he can fly." Jake grumbled and crossed his arms.

"He's just a little tired." Aang defended his bison as they glided to the Northern Water Tribe.

The time goes on, the trio were actually curious on who Jake was. How did he become a firebender and what's with the strange outfit.

There was an awkward silence between them and Jake was sick of it. "Alright, I know you have some questions to say it."

Taking a chance, Katara went in first. "Who are you?"

"Jake but my real name is Lazarus. Jake is just a nickname." Jake or Lazarus shrugged his shoulders.

"Are you a firebender?" Aang asked, a little worried.

"No, well, until now."

"Wait, you weren't a firebender before? Then how the heck did you do all that?!" Sokka waved his hands hysterically. "You incinerated a boat load of soldiers and you say you're not a firebender?!"

"Well, it has something to do about what I can do." Jake smiled a sadistic one. He could just see the look on their eyes now.

"Then, what can you do?" Katara inquired curiously. The trio watched him closely and Jake did something that made them jump in surprise and lurch in disgust.

Out of his body came worm like things that engulfed his entire body. Starting from his feet, he took form of a Blackwatch soldier he consumed.

"I hunt, I kill, I consume, I become." He said in an unearthly voice. Jake then held up his hand and four menacing claws began to take form.

"I'm less than human." He changed to his armor form and flexed his claws. "But also more."

After his demonstration of scary powers, needless to say, the trio scooted away from him. Avatar or not, that was some scary things.

"As for how I become a firebender." Jake snapped his fingers and a giant inferno engulfed an iceberg, melting it. "Every living thing I consume makes me stronger. I gain their shapes."

Jake transformed into a beautiful woman making them go wide eyed. "Memories and powers." He changed into a Fire Nation soldier then back to his base form.

"I am the reason why there is a food chain and I am at the top of the primordial eco system."

After hearing and seeing what he could do, they were left to wonder only one thing – how many did he kill?

"So, how many people did you…" Aang couldn't finish his question because he would never kill.

"Killed, mutilated, shredded? Oh, lots. In my home, I was credited for causing over eight million deaths in just three weeks." He smirked and laid down on the huge saddle.

"Of course, there could be more."

Katara, Sokka, and Aang had their mouths hanging open in pure shock and dread. This man, this monster just claimed that he was responsible for millions of deaths in just three weeks. That was more that the entire war put together!

Not wanting to know more of his deeds, the trio just sailed until Appa could fly again.

After a run in with Zuko that resulted in Aang entering the Avatar state, he decided to visit his old home, the Southern Air Temple.

Katara and Sokka looked worried and Jake understood why. Aang never knew what happened to his people. And Jake didn't care, people were expendable.

"Aang, you've been gone for a century, things will be different." Katara tried to reason with him but Aang just shook his head.

"Yeah, that's the point. I've been gone a long time and I wanna know how things are." He said solemnly.

"Besides, I want you guys to know Monk Gaytso. He's really cool!"

Jake decided to explore this temple of Aang's while he reminisced. All in all, it felt just like New York. Oh, how he missed those times of mindless slaughter of Blackwatch and infected alike.

Traversing towards different sections on the site, he watched at Katara and Sokka desperately tried to hide the remains of Aang's brothers and sisters from him.

"Idiots." Jake jumped to where a skeleton was and guessed it was Gaytso. Poor guy must have gone down fighting. Well, at least he went down like a man unlike those so called Fire Nation and Blackwatch cowards.

"Gaytso…?" A saddened voice sounded behind him and Jake sighed. This was going to be hard for the kid.

Moving out of the way, Jake presented Aang with the image of his dead father figure. Upon seeing the remains of his beloved mentor and friend, Aang fell to his knees.

He…he was the last. The last of his people. They were all dead.

In a fit of grief, Aang entered the Avatar state and began tearing the temple apart.

Sokka was blown off his feet and only Jake and Katara were left standing. The former due to his weight and strength and the latter because of her grip around a pillar.

Eventually, Katara hugged a tearful Aang as he cried. "Shh, it's okay, Aang. It's okay."

All over the world, beacons signaled. The temple of Avatar Roku illuminated with a blinding light as with all other temples of previous avatars came to life.

Now they knew the Avatar had returned.