Got to the end of Mt Olympus, and I definitely think there's some foreshadowing going on with Xigbar starting the quote off the "May your heart..." before getting cut off.
So far the hardest part of the game was Mickey and Riku vs the Demon Pillar in the Realm of Darkness. Still one shot it though.
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I've seen Darkness you people wouldn't believe. Gummi Ships on fire off the shoulder of Radiant Garden. I watched waves glisten in the dark near Dark Margin. All those moments will be lost to darkness. Like tears in rain.