A medium shot, 3/4 view anime illustration of Oblivion Ancient, a 17-year-old appearing dragonewt girl with a serene, airheaded expression, standing centrally in a mystical landscape. She has long, pale red hair and matching pale red eyes, featuring black dragon horns protruding from her head and a sleek black scaled tail extending behind her. She is dressed in a sophisticated Chinese-style cheongsam (qipao) adorned with intricate gold embroidery, wearing magatama beads and a flowing, ethereal sash reminiscent of a celestial robe (hagoromo). Her right hand lightly grips the hilt of an indestructible large black greatsword made of her own scales, while her left hand is raised in a gentle, meditative gesture. She stands atop a surface where ink-like pitch-black shadows bleed outward, with faint, ghostly apparitions of ancient heroes and magical beasts shimmering within the darkness. The environment is a surreal, void-like expanse with floating debris and swirling dark mists. The lighting is atmospheric and moody, featuring a high-contrast palette of deep blacks and shimmering golds, with soft, luminous highlights on her pale red hair and the golden threads of her dress, evoking a sense of ancient power and otherworldly tranquility.