Warming up for Avengers' movie here's my Mjolnir model.
You can download this papercraft (and its source files) from [link]
Almost all parts fit in one page, only the handle and the support parts are two-page parts, use alignment lines to cut, align and join the pieces before building this parts.
Once you build all the parts, use the support part to join the head to the handle and also to align the top part over the head. Check the schematic included in the last page for further reference.