A detailed 3D model of Morrigan, the Celtic goddess of war, death, and fertility. She has long black hair, red eyes, and wears dark Celtic armor with raven motifs. A tattered black cloak flows behind her. She holds a spear and a magical staff, surrounded by spectral ravens. Her stance is regal and fierce, standing atop a battlefield with fallen warriors. The model should have realistic textures, glowing magical effects, and a supernatural aura.