A while ago, I saw these magnets and I was like, "Conan fought yeti?!" And a reader named rozum was like "Yup" and he most graciously pointed me to where it happened. Namely, pages 31-35 of King Conan, issue 15.
Note to self: Please add "UHR?, RUHRRR, RUHRR, GRARRR, URGH?, ROARR!" to the Everything Yeti Has Ever Said page.