Androvich Kron (Earth-5171)

"How many more bones will you crush? How many lives will you take in the pursuit of what you call freedom? You are the product of everything you fear: violence, darkness, helplessness. All that remains is for you to watch, as I drag your beloved world into oblivion."

- - Living Brain

Androvich Kron was a Soviet scientist who defected from the Allies to the Axis and started serving on the Nazi Party's weapon division of HYDRA alongside Black Mask and the Joker as the Scarecrow. A genius in chemistry, Scarecrow developed multiple chemical weapons for HYDRA as well as creating multiple war machines years ahead of it's time, which guaranteed HYDRA as a strong opponent to the SSR. With the defeat of the Axis in the aftermath of World War II, the death of Black Mask and the seemingly death of the Joker and Batman, Scarecrow started rebuilding HYDRA from scratch within the American government, namely S.H.I.E.L.D., acting as it's new head alongside his fellow surviving HYDRA operative Poison Ivy. As time passed and Androvich died with each day duo to old age, he developed a mean to transfer his brain to a machine which would allow his consciousness to survive forever, as the Living Brain.