You want mind-blowing plot, it's got to be Tsubasa Reservoir Chronicle. Actually, I don't know too much about the anime, I'm pretty sure they botched it up badly, but the original manga...I couldn't even finish it because it started getting too confusing.
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Ulti (in one of his Post-Contest Analyses): God of War turned a 5 hour deadlock into a total laugher
Anagram: Oh God, Tidus and Yuna were involved?