Jon Kristiansen, better known as “Metalion,” is the legendary Norwegian editor and founder of “Slayer Mag”, one of the most influential fanzines in the history of extreme metal. Starting in 1985, his fiercely independent publication chronicled the birth of black, death, and thrash metal from an insider’s perspective, offering raw interviews, handwritten layouts, and underground authenticity. Kristiansen’s obsessive dedication to documenting the scene captured iconic moments long before they reached wider recognition. Equal parts archivist, fan, and critic, his legacy is enshrined in the “Slayer Mag Diaries”, a cult classic that bridges zine culture and the visual mythology of metal’s golden age.