Black-and-grey tattoo design for my outer forearm that…

Create a black-and-grey tattoo design for my outer forearm that blends into my existing biomechanical / bio-organic tattoo. Make it more organic than mechanical, with tendons, alien muscle fibers, exoskeletal plates, and subtle cables. The new design should flow downward naturally and look like it was always part of the original tattoo. Use high contrast, layered depth, and negative space suitable for a real tattoo.