Milos
Masaryk was a Soviet intelligence agent who was assigned
as a security guard for Anton Vanko, a Soviet inventor
who developed the Crimson Dynamo armor. Vanko managed
to defect to the United States, and Milos superiors
ordered him to retrieve the inventor, outfitting him
with another of Vankos inventions: a helmet
capable of projecting destructive blasts. As the Unicorn,
Milos tracked down Anton Vankoa and confronted Iron
Man, who was in fact responsible for Vanko's defection.
The Unicorn forced Iron Man to return to Europe, but
Iron Man escaped.
The
Unicorn later became a free agent, appearing as an
agent to Count Nefaria claiming the need to raise
funds for subversive activities. However, when Nefaria
was defeated by the X-Men, the Unicorn escaped.