a long-standing swrod project started in 2006 (and its still not finished ) the blade is hand forged from a leaf-spring of an old horsewagon. the handle is carved from a piece of moose-antler and the scabbard is wood with leather coating and iron parts...
"surmanisku" is finnish and stands for "killing-blow"
thanks it is as solid as it can be, it has been heat-treated with traditional methods to a spring-like state, just like real swords, so you would do fine with this sword on an ancient battlefield
mostly by asking A LOT of questions from the local blacksmiths and other ppl who knew about these technigues, and by reading a couple of books from this trade, but it also takes some practise and a lot of trial and error