Create an illustration of a gothic raven perched on a skull, surrounded by thorny branches and a crescent moon. The raven’s feathers should be textured with intricate linework, and the scene should be framed with bold outlines for clarity. The design should have a transparent background, rendered in ultra-detailed 8K vector art. The color palette should include dark, moody colors for the raven and skull, with subtle highlights in silver or white for the moon, and dark greens or browns for the thorny branches.