Highly detailed black and grey tattoo design of Kratos from God of War, showcasing his iconic muscular build and stern expression. The design should emphasize Kratos' signature war paint, beard, and battle-worn appearance. Include intricate details of his armor and the Leviathan Axe, with elements of Norse mythology subtly incorporated into the background, like runes and ancient symbols. The style should be hyper-realistic, with strong contrasts and sharp lines, capturing the intensity and power of Kratos