Robbins drew The Shadow as a character with a living cloak that swirled around him constantly. The Shadow leaps and hurls himself at his enemies, and is always ready to make a fight or to fire off his pistols. Whatever prohibitions restricted Batman when firearms came into play, they did not exist for The Shadow who was still at least ankle deep in the pulp milieu from where he originally sprung, versus comic books.
The design style seems to be akin to monster movie poster art. Despite the blazing red eyes, Robbins lets the reader know the mummy is not all he is supposed to be - - note the hairy legs.
