-15 years later-
"Failure!" Karai yelled as she tossed the table across the room. "Failure! And even MORE Failure!"
The mystic foot watched in fear at their master as she rampaged. She still wanted to get the turtles after they had Chr'ell, the previous Shredder, exiled to an ice crystal in god knows where in space. Karai was getting away to explode on the Mystics for their failures at getting rid of them.
"Mistress Karai! Please give us another chance!" The Water Mystic pleaded.
Karai pointed her claws at the Mystics.
"I have given you enough chances!" She said as she raised her hand, ready to swing.
"Wait!" The metal Mystic yelled. "I have a suggestion! You just have to give us another chance!"
Karai growled at him, but decided to listen.
"Mistress Karai, we still have them." Metal said. "We could use them-"
"My father's side projects!" Karai yelled. "Do you think I would disgrace the Foot Clan by letting them out!"
"Of course not, Mistress." Metal said. "But we are running out of options. Besides, the reason Shredder trained them was for the time they defeat his enemies, and from what we all have seen, they made extraordinary progress, even the limp-legged one."
Karai raised a brow. On one hand, to have such lower creatures that she hated since she first layed eyes on them see the light to day would humiliate her and her father in front of the turtles. But on the other hand, they were almost as good as she was and proven themselves useful in training, begging to fight. She may as well just give it to them.
"Alright," Karai said. "But they fail-"
"They won't." Metal said.
Karai placed the Shredder' mask and helmet on her head and told the Mystics to bring them in. The mystics did as told and teleported the 'side projects' to the room.
Karai looked at them as they bowed before her. To her, they've grown uglier with age.
"What is our commands...Master?" The biggest of them asked.
-Later-
The turtles stood in central park, waiting for Karai. She had given them a message that she had a surprise for them and now they were waiting for it.
"So, whatcha think Karai has for us this time?" Mikey asked.
"I'm not sure, Mikey." Leo said.
"Well, whateva it 's, we've faced aliens, monste's, and people from othe' dimensions." Raph said laughing a little. "What can she give us dat could surprise us now?"
"Turn around and find out."
The turtles turned quickly and readied their weapons. They gasped at what they saw. Four MORE turtles!
They had blue skin with white freckle-like spots and black shells with white vertical lines. Their hands didn't have three fingers like the turtles, they were just palms. the only finger they had was a thumb on each hand. The one with the dark blue mask stepped forward with a smirk on his face.
"Hello turtles." He said evilly. "And goodbye..."