The Barbarian Starts Thinking

Ihaveplan! Cass, who transmigrated into a world of swords and magic, discovers that by eating mushrooms and thinking up inspirations, he can complete all sorts of bizarre plans, becoming the idea king of the Mourning Mountains. My great-great-great... grandfather was actually a chatterbox goofball. Damn arranged marriage, what do you mean a werewolf is my wife? No one in this world understands alchemy better than me. I understand astrology better than all the prophecy mages. I'm thinking of giving the unmarried youths of the tribe a succubus, so they stop fighting each other in heat.... "I just want to be a happy, carefree warrior, drinking, singing, and beating up Southerners, goblins, drow sprouts, liches, dragons... and playing staring games with medusas." "I'm a barbarian with only 5 intelligence, what's wrong with me thinking? Just because the gods and spirits tricked me into becoming the Great Shaman?"