Mjolnir is a legendary war hammer with a photorealistic design, featuring a large, block-shaped head made of dark, weathered metal with intricate Norse runes engraved along its surface. The handle is wrapped in worn leather strips for grip, tapering slightly towards the end where a loop of iron chain is attached, symbolizing its mythical ability to return to the wielder. The hammer's overall appearance is imposing, with a balance between historical authenticity and fantastical elements, such as faint glowing runes that pulse with power during use.