Red Sonja (1977-1979) #1

Plot

While wandering the forests of Argos, Red Sonja witnesses a warlord named Andar of Bezfarda attacking a unicorn; He cuts off the unicorn's horn in the hopes of obtaining its mystical properties; Red Sonja leaps down and liberates the unicorn from its attackers; She rides off with it, and both rider and mount develop a close bond. (mycomicshop.com)