While in prison, Vikernes develops his ideology of Odalism, a neo-pagan belief system incorporating elements of nationalism, racialism, and anti-modernity. He begins writing about these ideas, laying the foundation for his later online presence.

Vikernes becomes increasingly active online, using various platforms to share his views on paganism, politics, history, and culture. He creates websites, blogs, and YouTube channels to reach a wider audience.

Vikernes's online content is frequently controversial, containing statements that are considered racist, anti-Semitic, and promoting extremist views. This leads to the removal of his content from several platforms and ongoing scrutiny of his activities.