I was really hoping for Kaiba to win with Blue-Eyes but there were no special ass-pull card for him to use it with like Yugi did with Dark Magician and Dark Magician Girl with the Ragnarök play. So Fiend Sanctuary made the most sense as for the win condition card that we never would've seen until now.
I know it makes no sense but the Spell Sanctuary is was actually a useless card to use in his duel with Yugi because by his *own* tournament rules you could already do what Spell Sanctuary did in every duel regarding an official Battle City match.
@UltimateD755 is apparently not good enough to beat Mai and Joey without cheating/PA. His God card had abilities that just should auto win a duel. I just disagree.