Yu-Gi-Oh!, Season 3: Enter the Shadow Realm

Kaiba:
What do you want, Ishizu?

Ishizu:
I would advise you to be present for the final duel of your tournament, Kaiba. Yugi will need your help to defeat Marik and fulfill his destiny.

Kaiba:
No thanks, as far as I'm concerned, I'm done. Battle City's over for me, and the sooner I put this all behind me, the better. [starts to walk away again] I've had about all I can take of you people. So leave me alone and have a nice life.

Ishizu:
Kaiba, wait! Walking away now is a huge mistake.

Kaiba:
Really? And why is that, Ishizu? Let me guess, you read about it in on your ancient fairy tales? Come on, Mokuba!

Ishizu:
Your future's at stake! And deep down, you know that as well as I do, right? I know you are able to read the ancient Egyptian text. And you're well aware of what is written on the stone. The sorcerer may have been the Pharaoh's rival, but he was also his friend! The sorcerer is you, Kaiba. And you must do for Yugi what you did for the Pharaoh 5,000 years ago--help your friend. Without you, he can't save the world from destruction!