Craft a mesmerizing piece of dark fantasy art featuring a bioluminescent brain, pulsating with eerie, otherworldly light. The brain, suspended in a shadowy, mystical void, exudes an ethereal glow that illuminates the surrounding darkness with a haunting radiance. Intricate neural pathways crisscross its surface, shimmering with a mesmerizing array of bioluminescent colors - deep blues, vivid greens, and pulsating purples that dance in a hypnotic display. Wisps of ethereal energy spiral around the brain, casting ghostly shadows that flicker and fade in the dimly lit space. The scene evokes a sense of mystery and wonder, inviting viewers to delve into the enigmatic depths of the bioluminescent brain's intricate secrets.