The Barbarian Began to Ponder

I Have Plan! Cass, who transmigrates to a world of swords and magic, discovers that by eating mushrooms and generating inspiration, he can complete all sorts of bizarre plans, becoming the idea king of the Sorrowful Mountains. [My great-great-great-grandfather was actually a talkative goofball!] [Damn arranged marriage, what does it mean a werewolf is my wife?] [No one in this world knows more about alchemy than me!] [I know more about astrology than any prophet!] [I'm thinking of sending a succubus to all the unmarried young men in the tribe, to stop them from always getting horny and fighting each other!]... "I just want to be a happy, carefree warrior, drinking, singing, beating up Southerners, goblins, drow sprouts, liches, dragons... and playing a staring contest with Medusa every day." "I'm just a barbarian with only 5 intelligence, so what if I like to think? Just because I was fooled by the gods and spirits, I have to become a great shaman?"