Mjolnir, Thor's famous hammer, continues to inspire the craziest gadgets. Remember the tea filter, or more recently the Xbox, and even still in 2017 a rather ingenious toolbox whose handle extended into a real hammer.
Toolbox Thor's Hammer, 9 kg empty
Inspired by this latest nifty but rather cheap gadget, handyman Jonathan of YouTube channel Shadow Foam decided a few years later to make a "serious" version of it. The video below describes the manufacturing process for a beautiful baby weighing over 9 kg (without tools, and over 12 kg with it), consisting of two cases joined together by rigid foam and incorporating a huge mass as a handle. Will you be "worthy" (and muscular) enough to wield it?