A dark and atmospheric album cover for a nu-metal track titled

$A dark and atmospheric album cover for a nu-metal track titled 'Eternal Refrain.' The central focus is a vast, glowing hourglass that dominates the composition, its ethereal sand spilling endlessly into a void below, creating a mesmerizing sense of infinity. The hourglass emits a radiant, otherworldly glow in shades of blue, silver, and amber, contrasting against the dark, shadowy background. Surrounding the hourglass are surreal mirrored realities, represented by overlapping silhouettes walking through distorted, parallel worlds. The perspectives bend and twist unnaturally, creating an unsettling yet introspective visual metaphor for alternate realities and the cyclic nature of time. These silhouettes appear semi-transparent, with subtle reflections and refracted light adding depth and mystery. The title 'Eternal Refrain' is displayed at the bottom in a bold, metallic font with a futuristic glow. The text has a polished, gradient texture in silver and cobalt blue, subtly catching light from the hourglass's glow. The color palette features deep blacks and midnight blues, accented by glowing highlights in silver, cobalt, and warm amber, with intricately balanced shadows and lighting for a cinematic, powerful atmosphere that evokes mystery and introspection.$