Prompt hyper realistic black and grey tattoo design for the back of the forearm from elbow to hand a menacing octopus with a skull like pattern integrated into its head and body the octopus tentacles flow symmetrically down the forearm wrapping and shaping into the form of thor s hammer mjolnir from god of war ragnarok the tentacles form sharp bold symmetrical lines creating the outline of the hammer dark bold shading with high contrast black and grey ink thunder and crackling lightning emanate from the hammer in the background enhancing the dramatic effect designed to flow naturally with the arm anatomy from elbow to wrist and hand tattoo idea - made by Ink Studio AI