Formed in the mid-1990s in Brazil, Miasthenia is a band known for their unique blend of black metal with folklore and indigenous elements, which gives their music a distinctive atmosphere and depth. The group consists of Hécate (vocals, keyboards), Thormianak (guitars, bass) and Hamon (drums), each bringing their own expertise to craft the band's mystical and heathen sound.

Miasthenia's work often delves into the rich history and myths of pre-Colombian civilizations, exploring themes of cultural identity, ritualism, and resistance. Their releases, such as "Antípodas" (2017) and "Legados do Inframundo" (2014), showcase an evolution in their sound, displaying a maturation in songwriting and a more robust production quality. The band's artistic growth is evident in their later work, like "Sinfonia Ritual," further solidifying their status as a unique voice in the extreme metal scene. With over two decades of activity, Miasthenia has successfully carved out a niche for themselves, gaining respect and admiration within the metal community for their innovative fusion of black metal with regional historical and cultural narratives.