A formidable Incan high priestess from a fictional 15th century Tawantinsuyu empire stands atop a sacred mountain terrace during a dramatic volcanic eruption, wearing layered embroidered vicuña wool robes with intricate gold and crimson geometric patterns and a towering feathered crown of sacred quetzal and condor plumes, her long dark braided hair adorned with golden sun discs and shell beads, gripping a ceremonial gold-knobbed staff, fierce transcendent expression, dramatic molten orange and red volcanic glow illumination contrasting cool blue ash-filled sky from towering erupting peak, rich details of ancient stone temples and cascading sacred waterfalls, oil painting texture with digital precision, powerful dignified three-quarter composition against epic stormy ash cloud sky with lightning and rising stars, 4k hyperdetailed digital art