Luxu was possessing Braig/Xigbar, who has power over Space. It's possible that the Black Box was in some sort of pocket dimension, hidden in plain view all this time, not because of some complicated reason.
The question still is: why send literally everyone into a wild goose chase over a Box he knew where it was?
I'd like to think that Luxu was confronted about it by someone, and he just casually spilled the beans for the fun of it.
The question still is: why send literally everyone into a wild goose chase over a Box he knew where it was?
I'd like to think that Luxu was confronted about it by someone, and he just casually spilled the beans for the fun of it.