"Promise to a Princess" from Weird Western Tales vol.1 #12 (DC, 1972) by John Albano and Tony De Zuniga
It should have been the western equivalent of Weird War Tales - i.e. this particular adventure should have featured a fairy tale princess or something - but it was mostly a Jonah Hex book, with side-orders of El Diablo, Scalphunter and Cinnamon. Not that these guys' stories couldn't get a little weird, but they were a far cry from, say, Super-Chief. Certainly not Creature Commandos level.