In this competition, it's all about Japan's shadow warriors--the ninja. Four smiths are challenged to forge their own version of a ninja blade.

Four smiths lasso up their skills to recreate the iconic Gaucho knife. Those who survive an intense round of testing then must gallop home to forge the ornate Argentinian Saber.

Four smiths will need more than luck when they are given only a small sliver of high carbon steel and a whole lot of mild steel to forge a knife.

In this competition, the judges flip the script once again, letting the bladesmiths choose their challenge. Will they take it easy or go big to impress the judges? After an intense bout of testing, the judges take back control.

Four smiths need to either go Mai or go home when they're challenged to make a five layer knife.

Across three grueling rounds, competitors design and forge deadly edged-weapons of war. In the final round, the two remaining bladesmiths must forge one of the most iconic weapons from history; the Japanese Katana.

Four bladesmiths must forge a weapon using only reclaimed metal. With the clock winding down, two of the competitors are dramatically forced to improvise, and one almost doesn't make it through the round at all.

The bladesmiths must transform a steel "train spring" into a weapon of their choosing. Only two competitors will move on and are given just five days to forge a legendary Viking Battle Axe.