Design a unique and powerful avatar that embodies strength and mystique. The character is a fierce warrior from a fantastical realm, blending elements of ancient mythology and futuristic technology. Her hair is a cascade of vibrant colors—electric blue and silver—styled in intricate braids adorned with glowing runes. She has piercing, luminescent eyes that shift shades with her emotions, radiating an aura of confidence and wisdom. The avatar wears a sleek, form-fitting armor that combines organic and metallic elements, showcasing both elegance and durability. The armor is adorned with intricate engravings of mythical creatures and symbols that glow softly in the dark. In one hand, she wields a massive sword that appears to be forged from a shimmering, otherworldly material, reflecting the colors of her hair. The hilt is encrusted with gemstones that pulse with energy. The background is an ethereal landscape filled with floating islands and shimmering waterfalls, creating a dreamlike atmosphere. Wisps of magic swirl around her, enhancing the sense of power and otherworldliness. Capture her fierce expression and commanding presence, ensuring that the overall composition is dynamic and visually striking. This avatar should stand out as a symbol of strength, uniqueness, and the fusion of ancient and modern aesthetics.