An ancient witch stands atop a primordial tree beneath a swirling nebula

A solitary, ancient witch with deeply lined features and tattered, wind-blown robes stands on the gnarled crown of a massive, primordial tree whose twisted branches stretch upward into a vibrant, swirling nebula of purples, blues, and fiery oranges. Her hands, knotted and claw-like, radiate streams of crackling, electric arcane energy that arc through the cosmic void toward a shattered, distant planet suspended in the darkness. The entire scene is bathed in the haunting, ethereal glow of drifting cosmic dust and the faint, fading light of dying stars, casting dramatic shadows and highlights across the witch and the tree. The atmosphere is heavy with mystery and power, rendered in a dark fantasy concept art style with intense chiaroscuro lighting, echoing the moody, painterly techniques of Caravaggio and Rembrandt, with deep contrasts and rich, textured details.