Thunderbolt

Yz is a djinn — a genie-like magical entity — who became bound to Johnny Thunder after the young man unknowingly spoke the mystic words that summoned him. In early adventures, Yz remained invisible, leaving Johnny to assume his remarkable luck was entirely his own.

Few Golden Age characters can claim a publishing life stretching across more than eight decades, but Thunderbolt — born in the pages of Flash Comics #4 in 1940, conjured by the creative partnership of John B. Wentworth and Stan Asch — is exactly that kind of enduring DC treasure. Emerging from the electric dawn of superhero comics, this character has kept remarkable company over the years, sharing adventures with luminaries like Jay Garrick, Johnny Thunder, Carter Hall, and even Superman himself. With appearances spread across Justice League of America, All-Star Squadron, and 52, Thunderbolt has woven through some of DC's most celebrated corners of continuity, racking up seven key-issue appearances that any serious collector will want on their radar. Over 57 catalogued appearances and still going strong into 2026, this is a Golden Age original with genuine staying power — a rewarding discovery for fans who love tracing the deep roots of the DC universe.