The Death Tower

Very early story of our hero, and one can tell by this cover that the art department had yet to catch up to the familiar look of the Shadow, although the familiar green\purple lighting is very present in this, the sixth tale of The Shadow. As Agent T pointed out, this cover was reused four issues later on "Mobsmen On The Spot". Technically, this cover negates the highly anticipated cover for "The Shadow Unmasks".
(Oh, and by the way, he looks remarkably like Martin Landau)