Disclaimer: Teenage Mutant Ninja Turtles and How to Train Your Dragon do not belong to me. They belong to their respective owners, namely Viacom and DreamWorks.

Secret Headquarters of the Foot Clan, New York City, United States of America, Planet Earth.
July 2015.

Overlooking the wide expanse of America's most famous city from his hideout, an activity made available only by a big window that allowed it's occupants to see outside, Oroku Saki, known also as the Shredder, was deep in thought over how to destroy his hated enemy, Hamato Yoshi, those accursed Turtles and those who aid them.

Closing his eyes, he could still hear the raging fire all those years ago as he confronted Hamato Yoshi, who took Tang Shen away from him, but in turn, Oroku Saki took Yoshi's daughter.

"Master Shredder".

Opening his eyes, Shredder turned around to see Bradford, his once promising student now turned into a wolf-like creature, kneeling down before the steps leading to Shredder's 'throne' and by extension, kneeling down in front of the Shredder.

"Report, Bradford".

Nodding his head, Bradford spoke, "Yes Master. Tiger Claw has returned from his assignment with the report specifically for you, Master. He is waiting outside".
"Good. Now, leave, Bradford, and tell Tiger Claw to come in".
"At once, Master".

Rising to his full height, Bradford bowed, turned and walked on the catwalk, then through the doors.
Then, Tiger Claw appeared, walked over to the same spot where Bradford had kneeled, and kneeled himself.
"I return, Master Shredder".
"I trust you did the mission unseen".
"Yes, Master Shredder".
"Then make your report, Tiger Claw".
"It's confirmed. The artifact you asked for, it's the same one that the archaeological discovery team found in the Atlantic. A crystal in the shape of a key".
"Are you certain of this Tiger Claw"?
"Yes, Master Shredder. Your descriptions added up. Also, when one of the archaeologists touched it, it started glowing".

A long pause endured, and Tiger Claw awaited his master's response.

Meanwhile, the Shredder was in deep thought as he took a moment to absorb this information.
But then he came to a final conclusion. The artifact he had seeked, had been found.

"Excellent work, Tiger Claw. You did well. Now, you may leave".

As Tiger Claw rose, bowed and turned, walking away, the Shredder continued to contemplate the information.

A few weeks ago, his Foot Clan discovered an ancient spaceship, buried deep within New York City.
The most intriguing thing about it, was that it was not Kraang in origin, but as soon as he got his hands on it, he had it searched for any technologies which he could use against Hamato Yoshi and his disciples. But there was only information on the spaceship's computers.

The search had lead him to find, the Bifröst Key, an artifact that was said to have the capability of traveling through time and to other places.
And it had been found, in the chest of a Viking longship that had been dug up from the Atlantic.

As Oroku Saki closed his eyes, deep in thought, he began thinking on the so many ways on how he could use this Key to get his revenge on Hamato Yoshi and his disciples.

But unknownst to the Shredder, Tiger Claw's report was overhead by the Turtles.

Yes, this is a Teenage Mutant Ninja Turtles and How to Train Your Dragon crossover story that had been swarming around in my head for quite a while.

This will be set, in between the Deadly Venom and the new Turtles in Time episode coming soon, whilst in Httyd time, I'm still trying to figure that out.

Ohhhhhh, I'm so looking forward to this, and I hope you are to! I've got so much ideas for this crossover story, I'm trying not to go too overboard!

So, don't forget to leave a review whenever you can, and see you next time.

Update (11/8/15): Yeah, I still am trying to figure out which time in the Hyttd time, whenever to set it during around the time in between Dawn of the Dragon Racers and Race to the Edge, as so to make the Dragon riders more closer in age to the Turtles, so to better interact with them (somewhat), or set it around sometime before Httyd2. But don't worry, it'll be sometime before we get to the point where they'll get there, so I'll have plenty of time to figure out where to go.

Update (6/11/15): Just cleaning up some dialogue.