A realistic black-and-grey semi-sleeve starting from a…

A realistic black-and-grey semi-sleeve starting from a pre-existing solid black geometric armband. The design features high-contrast 'God rays' or light shafts erupting from the gaps between the black blocks. The light beams should have a textured, smoky realism, swirling upward toward the shoulder like a cosmic nebula. Integrate realistic elements within the light: a metallic, weathered TARDIS and a 3D-textured superhero emblem (superman/captain america) appearing as if emerging from a fog. The background of the arm should be deep, dark 'negative space' shading to provide maximum contrast for the light beams. Leave 3-4 distinct 'clean' beams of un-inked skin for future realistic additions.