[2] The Blue Bullet first appeared in Invaders #11-12 (December 1976-January 1977), and was created by Roy Thomas and Frank Robbins.
Johann Goldstein was a Polish Jew who studied science in the 1930s, with his older brother Jacob.
He changed his name to Professor Jonathan Gold and began working on a secret project.
Using some ancient books of the Cabala, Jacob transformed into the Golem and freed the Invaders.
When the Invaders attacked Doctor Death’s base, the Golem remained neutral to keep from putting his brother in danger.