A majestic Black Tortoise, the guardian deity of the North from the Shan Hai Jing, rendered in the style of a traditional Chinese ink wash painting. Monochromatic palette, expressive brushstrokes, serene yet powerful presence. The tortoise has a large, intricately patterned shell, representing longevity and wisdom. A serpent, its scales rendered with delicate detail, coils protectively around the tortoise's body, symbolizing strength and resilience. Mist swirls around the creature, hinting at the mystical realm it inhabits. The background features a minimalist landscape of distant mountains and flowing water, representing the balance of yin and yang. A sense of ancient power and unwavering protection emanates from the Black Tortoise
