Dr. Xa-Du
Dr. Xa-Du is a Kryptonian villain and one of Superman's enemies, notable as a criminal from Krypton's past who was condemned to the Phantom Zone as punishment for his crimes.
Few villains make their entrance through DC's legendary Who's Who directory and still manage to haunt the publisher's pages decades later, but Dr. Xa-Du is exactly that kind of enduring dark curiosity. Introduced in 1986 during the Copper Age, this Kryptonian menace has kept some of the most formidable company in the DC Universe — sharing pages with Superman, Batman, Bruce Wayne, Clark Kent, and the notorious General Zod. His appearances in Batman/Superman place him squarely among the heaviest hitters the publisher has to offer, and for collectors who love digging into the deeper lore of Krypton's shadowy corners, Dr. Xa-Du is a rewarding find. Rare in the catalog but rich in pedigree, he's the kind of character that rewards the curious fan willing to look beyond the first tier.

Top series
Covers through the years — 1986–2014
1986
2014 

