Fyrnask is a black metal project from Lübeck, Germany, active since 2010 with a substantial catalog spanning seven releases from "Fjǫrvar Ok Benjar" (2010) through "Nattverk" (2025). The project draws on Nordic-themed imagery and old Norse aesthetics across atmospheric, ritualistic black metal compositions.

Fyrnir is a pagan black/death metal project from Naples, Italy, formed in 2022. They channel Norse-influenced pagan metal traditions through a distinctly Neapolitan perspective, merging black and death metal with mythological themes.

Fafnir is a pagan black metal band from Ferrara, Italy, formed in 2015 and named after the legendary Norse dragon who guarded cursed gold. They deliver pagan-themed black metal steeped in northern European mythology from the flatlands of Emilia-Romagna.

Farbauti is an ambient black metal project from the More og Romsdal region of western Norway, formed in 2021. Named after the father of Loki in Norse mythology, they blend atmospheric ambient textures with black metal from the fjord-carved coast of northwestern Norway.

Fänggen is a black metal band from Lower Austria, formed in 2014, whose 2016 album "Geist des Waldes" — recorded and mixed in 2015 and released as a limited CDR with a conifer branch by Narbentage Produktionen — draws heavily on the atmosphere of dark, misty Central European forests. The four-track record represents a nature- and pagan-oriented underground black metal aesthetic rooted firmly in the Austrian woodland landscape.

Fäulnis is a black metal band from Hamburg (later Flensburg), Germany, active since 2007. Known for raw black metal vibes with frosty riffs and screams, the band released the album "Cholerik Eine Aufarbeitung" and features members who also play in Fvneral Fvkk and Voidhaven.

Feinmharu is a Scottish black metal project emerging in 2025, whose Irish Gaelic name reflects Celtic cultural roots channeled through black metal extremity. The project represents Scotland's newest wave of Gaelic-influenced black metal.

Félonie is a black metal band from Nendaz, Switzerland, formed in 2023. The project emerges from the Valais Alps, channeling black metal's cold fury from one of Switzerland's mountain communities.

Fordarv is a black metal project from Sweden, formed in 2020. Their name — Swedish for 'corruption' or 'ruin' — captures the corrosive, destructive character of their black metal.