Nuctemeron

Based on the release titles you've provided, you are likely referring to the Brazilian black metal band Nuctemeron.

Nuctemeron is a raw and aggressive black metal band hailing from Brazil, active since at least the mid-2000s. They are known for a primal, lo-fi sound that embodies the chaotic and blasphemous spirit of underground black metal. Their lyrical themes and album artwork consistently focus on Satanism, anti-religion, and dark occultism, as is clearly evident from titles like *Fuck Off !!! (In the Name of Satan)* and *Demonic Sceptre*. Operating deep within the genre's underground, they have built a catalog of demos, splits, and full-length releases that are revered by fans of harsh, uncompromising extreme metal.

Their music is characterized by distorted tremolo-picked guitars, relentless blast-beat drumming, and harsh, screamed vocals. Bands like Nuctemeron are integral to the global underground black metal scene, maintaining a fiercely independent and antagonistic ethos. While specific member details and a comprehensive history are not widely publicized, their consistent output of releases solidifies their presence as a dedicated force in the South American extreme metal underground.