Ever-enigmatic heavy metal pioneer King Diamond sure hasn't made it easy for media to preview his upcoming tour, which kicks off this Tuesday at San Antonio's Boeing Center at Tech Port. The Danish singer has eschewed press interviews — sorry, folks, we tried — and he's also known to take a conceptual approach to tours, crafting them around stories from his elaborate mythos. Adding to the confusion, he's recently toured with Mercyful Fate, the act he helmed in the 1980s and periodically returns to.