Sica Sword: The smiths must forge a signature blade out of a flintlock pistol before two go on to craft the lethal gladiator sword, the Sica. (S4, ep 28)
The Rhompaia: The bladesmiths are forced to achieve one of six Damascus patterns for their first round blade, before two go on to forge the fearsome Rhomphaia sword.
The Schiavona: The bladesmiths must harvest steel from farming tools before crafting the decorated and deadly Schiavona sword.
Jumonji Yari: After forging functional friction holders, two finalists go on to craft a Japanese trident called the Jumonji Yari, a weapon of unparalleled strength. (S4, ep 25)
The Horseman's Axe: Four bladesmiths are pushed to their limits when they must forge a signature blade from springs of steel, before recreating the mighty horseman's axe. (S4, ep 24)
Viking Edition: Competitors march into a dry moat where they resurrect old swords and forge them into a Viking Seax. (S4, ep 23)
Ultimate Champions Edition: Five champions return to the anvil, with the final two competing to craft the finest Tai Chi sword. (S4, ep 22)
Knights Templar: The smiths must forge together rusty chain mail and high quality steel to produce weapons used by the Knights Templar. (S4, ep 21)
International Championship: Four of the top smiths from around the world compete in an international championship, with the best two crafting a Spadroon in the final. (S4, ep 20)
The Yatagan: The smiths are tasked with turning a rusted 1971 Mercury Cougar into their signature blades, before creating an elite military weapon known as the Yatagan. (S4, ep 19)