Hello everyone! I finally had time to end this chapter. Sorry for taking too long writing this, but I had to do many projects. Anyway, the chapter is finally here! Thanks a lot for following, reviewing and giving a "favorite" to this story! It means a lot for me! Now, enjoy!

I don't own TMNT.

"The New Substance"

The night before…

The turtles decided to do something different that night. They were tired and they didn't wanted to go to check on the Kraang or Shredder's lair for nothing, so instead of fighting, they decided to train, perhaps, Leo decided to train that night. Obviously, his brothers preferred to spend the night watching movies or eating pizza, but Splinter ordered Leo to dedicate the night to training, so they didn't have much of a choice.

"Okay guys, are you ready?" Asked Leo, standing with his brothers in a roof.

"Ready for what Leo?" Raph replied.

"Ninja Hide and Seek. Mikey, you'll have to find the rest of us. The ones you find will have to help you to look for the others. If you don't find the three of us, you'll do the chores for the ones you didn't found for a week. One, two, three, go!"

"Wait… What?!" Before Mikey could finish the phrase, all of his brothers where hiding already. "That's not fair!" He shouted. "I wasn't ready!"

He realized that he didn't have time for complaining. He had two minutes to find his brothers unless he wanted to do their chores for a whole week. He ran, looking for hiding spots. After some seconds, he found Donnie hiding behind in the stairs of the building.

"Gotcha!" Mikey yelled.

"Ugh, this is no place to play Hide and Seek. There are no hiding spots." Donnie said frustrated.

"Stop complaining Donnie. We have to find the others."

They both started looking. Seconds later, they heard fight noises..

"Mikey! Follow the sound!" Donnie ran.

"Ugh, I guess that they are fighting each other again. Boring!"

They arrived to a building and they noticed lots of Footbots destroyed, lying in the rooftop. Leo and Raph weren't there.

"They weren't fighting each other. They were fighting the Foot."

"I noticed Mikey, but where are they?"

They both heard the sound of a car, riding on the street. Mikey looked at the street.

"Donnie! It's Tiger Claw! He kidnapped Leo and Raph!"

"What? We have to help them!"

Meanwhile…

Raph and Leo were lying unconscious on the floor of the Foot's van, with all of the missing Footbots surrounding them, plus Fishface and Tiger Claw, who were on the front seats, plus Rahzar, who was on the top of the van. When they arrived to Shredder's lair, they were still unconscious, so the Footbots took them out of the van easily.

"Master, we've kidnapped two of the turtles." Claimed Tiger Claw as they arrived to Shredder's throne.

Shredder responded as he saw the two unconscious turtles. "Great. You've brought the two strongest turtles. Where are the two missing turtles?"

"Well, we didn't have enough time to take them too, but don't worry, they'll come to help these ones." Fishface assumed.

"Well done. Meanwhile, take them to Stockman. He said that he wanted to test a new substance."

"As you command, Master Shredder." Rahzar talked.

They all headed to Stockman's lab.

"Did Shredder mentioned something about a new substance?" Fishface asked.

"Yeah, I wonder what could it be. Stockman is insane, plus Shredder's crazy ideas to take vendetta on the turtles, it doesn't sounds too good."

"Rahzar, Fishface, shut up. We are not supposed to care about that stuff. We are payed to follow orders, so stop gossiping."

"Argh… My head."

"The red turtle! He is waking! Rahzar, Fishface, immobilize him!"

"Rahzar? Fishface? What are you doing? Where are my brothers?" Raph shouted as he tried to escape.

"You ask too many questions, little turtle. About your brothers, the blue one is here, the other two will arrive soon and we will be waiting for them." Rahzar answered.

They kept walking to Baxter's lab. When they were about to arrive, Leo woke up, but Tiger Claw immobilized him too.

"Leo, are you alright?" Raph asked to his brother.

"Besides that we will be probably tortured, I'm fine."

Finally, they arrived to Baxter's lab, where they founded Bebop and Rocksteady.

"C'mon man, I believe in you." Bebop insisted.

"Yeah Stockman, I know that you are intelligent enough to make a retro-mutagen." Rocksteady followed.

"No he is not. It's been three years and all he could do was mutate Karai." Fishface interrupted.

"Bradford, Xever, Tiger Claw, what are you doing here?"

"Relax Stockman, we come in peace. Shredder asked us to bring you this two turtles for you to experiment your new substance in them." Tiger Claw responded.

"New substance?" Leo asked nervous.

"Don't ask. We don't know what it is either, but we are about to find out." Rahzar told him.

"Great. Could you please tie them up in those stretchers?"

"Let me go, you freaks!" Raph yelled as he fought in order to escape.

"What the hell are you testing on us? You are all insane!"

"Shut up turtles, we will test that substance on you anyway." Tiger Claw responded as he tied Leonardo to the stretcher.

"Oh my god, this will be epic!" Bebop exclaimed.

"I know. It's like the first time that we are going to be part of something important." Rocksteady said with happiness.

"Can you at least tell us what will the substance do to us?" Leo asked. "I mean, I think that we deserve to know despite that we will be getting it."

"As we said turtles, this is a test. The only thing I can tell is that it is mostly a weapon, so this may not be really nice for you." Stockman answered, as he filled two syringes with a pink stuff.

"Stop it Stockman! You won't get away with it!"

"Sorry Raphael, but I will. It's too late for you. You should have had escaped before. Now, which one of you will be the brave turtle who will get the shot first?"

"I vote for the red one." Rocksteady answered.

"So the red one will be first."

"I'll be first. Leave him alone!" Leonardo shouted, but everyone ignored him.

"Stay away from me Stockman!"

"Just take a deep breath Raphael. This will probably hurt." Stockman laughed as he introduced the big needle deep into Raph's arm, who screamed in pain. While Stockman injected the pink substance, Raph moved brutally, trying to stop the pain. When Stockman was done, he grabbed the other syringe and walked toward Leo.

"Are you ready? Relax, your brother didn't felt a thing."

Leo just closed his eyes, he knew that he couldn't do anything to stop it.

"Don't you dare Stockman! Not to him!" Raph yelled.

Stockman inserted the needle in Leo's arm, who contained from screaming. It was too painful. He started to moan, move and whimper. Finally Stockman was done.

"Congratulations, you handled pain like a champion, not like this brother of yours."

"Ok, you did it Stockman, now tell us, what was it for?" Leo insisted.

"Could you please take them into those cages? I would like to have a constant view on them so I can write down the effects of my new weapon."

Tiger Claw, Rahzar, Fishface and Rocksteady obeyed and went to untie the turtles from the stretchers. Suddenly, the lights went out on the lab.

"What's going on?" Bebop asked, distracting the others. Then, two ropes fell down from the ceiling, grabbing both, Raph's and Leo's hand and pulling them up. After that. The lights went on again. They all realized that Leonardo and Raphael were gone and when they looked up to the ceiling, they found out that Michelangelo and Donatello had entered to the lab unnoticed and saved their brothers.

"In your face, you morons!" Donnie yelled as Mikey just laughed.

"Well, you can laugh all you want, but your brothers were still injected with my new substance! They will have interminable nightmares, until they become paranoid, so good luck with that!" Baxter shouted angrily.

"We are fine Dexter Stickmen! Good luck telling Shredder that we escaped!" Raph answered, throwing a smoke bomb.

The turtles finally arrived to the sewers.

"Woah man, that's a big bruise in your arm." Mikey exclaimed.

"I know Mikey, shut up." Raph responded.

"What did they do to you two?" Donnie asked.

"Well, Stackboy said it. He tested a substance on us, but we are alright. Besides the painful shot and the big bruise, there is nothing wrong with us."

"Yeah, Leo is right. Thank you for saving us."

"No problem." Mikey yawned.

"Yeah, it's been a long night. We should go to sleep." Donnie suggested.

"You're right. Good night everyone."

With that, they all went to sleep, ignoring the nightmare that they were about to begin.

So that's it. Hope that you like it. Don't forget to leave a review and tell me how the chapter was! Thanks for reading and goodbye!