On a remote planetary sinkhole of sin and corruption, a small weapon-barely ten centimeters on a side--is hidden. If activated, this seemingly harmless crystal cube could tear a hole in the universe . . . and destroy the fabric of creation. Sagan wants it. Lady Maigrey wants it. And so does Abdiel, a cruel genius who commands a drugged army of mindless slaves. And now Dion is caught in this momentous struggle as he faces his greatest trial yet in his battle to gain the interstellar throne.