The Arena of Ice is the third episode of Season 13.
It aired on April 14 worldwide on Cartoon Network as part of "Into the Realms Part 1"
The Ice Samurai force Jay and Zane to fight eachother, while the ninja and elemental masters come up with a plan to save them.
Ice Emperor - Intruders! Where are your friends?
Jay - We don't know.
Ice Emperor - YES you do.
Zane - No we don't know where they are.
Ice Emperor - If you won't tell us where they are, you will be thrown in the Ice Arena, where you will have to fight each other, as my good friend Chen used to say, ONLY ONE CAN REMAIN.
Jay (Whispering) - You know what this reminds me of?
Zane - What?
Jay - Our time in dead's end, only now we have to fight each other, instead of a dragon.
Zane - They'll come back for us.
Cole - We can't go back for them.
Kai - But we have to! Ninja don't leave other ninja behind.
Nya - I agree with Kai.
Karloff - But we will get captured.
Cole - Maybe we can wear a disguise.
Kai - Okay, you are really making it seem like Season 9, we can't wear a disguise, we have to do something different.
Nya - Hmm, maybe we can spy on them.
Kai - OOH I HAVE A PLAN
So Mr. Pale, you will be invisible and spy on the Ice Samurai, and tell us what they are up to, then Karloff and Cole will come in and punch the ones in charge of Zane and Jay, then Me and Nya will free them.
Cole - Sounds like a great plan, for the first time ever, kai.
Kai - Hey!
Ice Emperor - OUR FIGHTERS TODAY ARE TWO OF THE CAPTURED INTRUDERS, ONLY ONE WILL REMAIN.