was an American band formed in Boston in 1997 that played a pivotal role in shaping post-metal. Blending sludge metal, ambient textures, progressive songwriting, and dynamic crescendos, they became renowned for expansive compositions that balanced crushing heaviness with atmospheric depth. Influential albums such as 'Oceanic', 'Panopticon', and 'In the Absence of Truth' helped redefine the possibilities of modern heavy music.