He had a hell of a pedigree in that his "parents" Gardner Fox and Fred Guardineer created, among other magician superheroes, Doctor Fate and Zatara!
Wearing a white tux, cape, and turban, Marvelo, the Monarch of Magicians (he had no alter ego) was described in various stories as "European" and spoke somewhat stilted English.
Aided by his Chinese assistant Zee, Marvelo was able to use incantations and hand gestures to dematerialize and walk thru walls, levitate himself and others, and perform other magic-based feats as the story demanded.
His arch foe was a similarly-powered Asian sorcerer named Guran who always escaped to cast spells again!
Marvelo zapped his way thru the first 20 issues of Big Shot Comics and the premiere issue of The Face before performing his greatest feat--totally disappearing from the memories of men until Alex Ross revived him 50 years later in Project SuperPowers! as one of the Big Shots superteam along with fellow Columbia Comics heroes The Face and The SkyMan!
We at Atomic Kommie Comics™ have also restored Marvelo to the ranks of four-color masters of magic by digitally-restoring and remastering his best Golden Age cover appearance as part of our Lost Heroes of the Golden Age of Comics™ line of kool kollectibles!
And, just a gentle reminder to pick up the Project SuperPowers comics, on sale now!
They're the best Golden Age revival books out there!