Ethereal Tree Under Cosmic Halo

A silhouette of a lone tree standing on a hilltop, with a circular halo of light surrounding it, set against a dark, cosmic sky. The main colors are black and shades of purple. The background is a deep black, speckled with white stars, evoking a sense of vastness and mystery. The halo is a soft purple, casting an ethereal glow around the tree, whose branches are spread wide, creating a mystical and surreal atmosphere. The style combines elements of science fiction and surrealism, with a focus on contrast and an enigmatic theme.