Forged in Fire season 7 episode 21
Episode title: Darb Sri Gun Chai Battle Sword
In a twist of fate, four smiths must forge a twist and stack Damascus blade. After two rounds the last two smiths standing must return home and recreate the Darb Sri Gun Chai, an enormous, double handed Thai battle sword. Two beautiful swords will be tested to their limits, but only one can be proclaimed the Forged in Fire Champion and win the prize of $10,000.
