Decline Of The I is a combination of multifaceted, post-black metal and exploratory lyrics, that dwell on topics of existential philosophy. Originating from France (Paris, Île-de-France), the band was created by AK, who descends from a rich portfolio of past and on-going acts (including Vorkreist, Merrimack, The Order Of Apollyon, Neo Inferno 262, Malhkebre and Diapsiquir). Decline Of The I is his most personal endeavor yet. The band's first three albums were inspired by the works of French surgeon and neurologist, Henri Laborit. "Wilhelm" pursues a different approach, based on the output of Danish philosopher Søren Kierkegaard, and marks the second installment of a new trilogy, started by "Johannes" in 2021.

"Wilhelm" builds on the foundation of "Johannes" and adds a more framed dimension; a rigor, a backbone. "Ethics demand an internal code. Loops, repetitions, the relentless nature of a law, all run through its five tracks, spanning over 45 minutes," comments AK. "It blends abrasive, avant-garde black metal with numerous samples, as well as elements of electro and industrial music. A constrained dive into the angst of ethics."

The drums for the new album were recorded, mixed and mastered by Francis Caste at Studio Sainte Marthe in 2024. Other instruments were recorded ta the band's personal studios. T.C. (Regarde Les Hommes Tomber) sang guest vocals on the song "L'Alliance Des Rats", while Vestal (Merrimack) is the author of spoken words on "L' Alliance Des Rats" and "The Renouncer". The artwork was designed by Dehn Sora (Blut Aus Nord, Deathspell Omega). New band photos were shot by William Lacalmontie. The music video for the lead single "L' Alliance Des Rats" was recorded by Laura-Lee Soleman.