The Black Flame sword is crafted from Black Flames Metal. It is extremely sharp and can slice through iron like mud. It is also embedded with a flame crystal, which contains the fire attribute, imbuing it with a flame effect and can burn an enemy with a single chop.
Nie Li and Duan Jian came across this sword on the fifth floor of the Divine Flames Family's store in the neutral trading town. Seeing how this weapon fit nicely with Duan Jian's natural abilities, Nie Li decided to buy it for him. Li Fu negotiated with him for a trade of two hundred Soul Concentrating Pills.