Caius Martius was a divinely gifted Roman vigilante who was trapped in a stone and released in modern America to fight crime as the Dart, which must be in the top five wackadoo origin stories of all time. He flies and wields a sword, like a dart, I guess.
References: [pdsh.fandom.com: Dart; modern name Caius Martius Wheeler; ]
[The Flame #3] [1940] [hero shown in advertising; ]
Metahuman Database 