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I'm not really sure when I read this book (or series of books), but it was definitely when I was a kid, so I'd say at least 10 years ago.
It's about a maze which when successfully navigated, gives the person great power. One of the powers that I remember was that a singer who had navigated through the maze was able to use her voice eventually to kill people. Eventually you find out that the maze was created long ago by some race known as the illuminati. It's set in a civilization that is less advanced than it previously was (some kind of downfall event occurred) but they still are able to travel between worlds. I specifically remember some threat that travels between solar systems and destroys the stars (by entering the stars and devouring it from the inside out). Sometime during the course of the plot the male protagonist gains the ability to travel through time and he witnesses the more advanced civilization in the past. There's a part where he is imprisoned with energy cuffs but he actually is able to escape but chooses not to and he plays with the energy cuffs by willfully changing the color of it using his mind as hes escorted away. You also find out that the star destroyer/devourer/whatever is actually a person specifically a woman (that got corrupted by the maze?).
This was read many years ago so some of the plot I listed might be slightly wrong. Sorry if I rambled...