The Fire Knight’s Greatsword in Elden Ring is a flaming Colossal weapon that is not only quite fun to use but can also be lethal. It is a weapon that can be fairly easy to get your hands on compared to others in the Shadow of the Erdtree DLC and can easily be your main weapon if you choose. Players who want to wave a flaming sword bigger than they are should definitely consider this as a prime option for their build if they can.