For the special 100th episode of Forged in Fire, four bladesmiths are tasked with forging a chopper and must choose from a mammoth pile of metals and materials from all previous 99 episodes. Some of the smiths are doomed to repeat the past, making mistakes made by former competitors. After a fiery round of tests, the two finalists head home to recreate one of the most epic swords in the history of this competition: the O-Katana.

Four bladesmiths plunge into the first round of competition where they must forge a blade using steel harvested from a vintage pinball machine. There's no playing around as the smiths aim to get to the next level before the clock runs out. After a wicked round of testing, only two smiths advance and return home to build a weapon rooted in savagery: the Barbarian Sword.