The Dragon of the Darkness Flame is an attack that can be used by Hiei to deal massive damage to opponents. The Dragon is powerful, but it can also backfire, damaging the user or killing them. Hiei was burned when she first tried to use the Dragon, but Ruka’s forcefield partially healed her arm. Fortunately, Jagan was able to heal Hiei’s arm. In a later episode, she was able to defeat Bui and take her own life.
In the original Dark Tournament Saga, Hiei channels the Dragon of the Darkness Flame into her sword, a technique known as Demonic Flames. Hiei claims that she is not copying Spirit Sword, but this is not entirely true. Similarly, she uses Demonic Flames to boost the blade’s cutting power. Because the Demonic Flames technique is similar to the Spirit Sword technique, Kuwabara accused Hiei of copying the Spirit Sword. However, Hiei claimed that she had no influence from the Spirit Sword and was simply a direct inspiration.
Unlike other attacks, Hiei’s Dragon of the Darkness Flame is incredibly powerful. It’s one of the most powerful attacks in the series, and has the ability to transcend time and space. Hiei’s Dragon of the Darkness Flame has a resemblance to a flame, but the difference is that instead of being a flaming ball, the dragon flies in the opposite direction. The Dragon of the Darkness Flame is incredibly powerful, and Hiei’s use of it makes it a memorable attack.