The Living Shadows!
Jack Kirby (writer and artist), John Severin (inks)
1st of 4 stories published in Yellow Claw #4, 04/1957.
In his latest technological marvel, the Yellow Claw has created a machine which uses previously unknown elements to manufacture "an attractor beam into ... another universe" and what it pulls out are living shadows crying be sent back. He will harness those creatures to break into the US facility hold Suwan.