Cursed Grudge Broadsword, Hararetsu

Cursed Grudge Broadsword, Hararetsu is the evolved form of the cursed weapon, Cursed Broadsword, Tsujigiri that Kurono owns.

Appearance
Its appearance didn't change much from when it was still the Cursed Broadsword, Tsujigiri except that it appears more sinister than its previous form and releases a much more sinister dark-brown aura that even beginners would instantly know that it is cursed simply because of its fiendish aura.

Personality
As a part of "her" curse, "she" desires to cut living beings and absorb their blood. "She" also seems to hate cutting creatures without blood like Skeletons but shows an intense liking to the blood of powerful living creatures, particularly Apostles.

"She" believes that if its wielder is sad, in pain, or hates someone, its wielder should just kill them cruelly and gruesomely without any hesitation, mercy, and compassion.

"She" can also be quite moody whenever Kurono left "her", literally flying into him after being separated from him for a long time and does not allow anyone else aside from Kurono to touch "her".

History
After seeing Irz Village burning and the people living there was killed by the Crusaders, Kurono realized that he failed to get back to Irz Village in time and became enraged. Kurono then allowed the curse of the Cursed Broadsword, Tsujigiri that he normally suppressed with Blackening to flow into him, inflicting him with a lighter version of the Bad Status, Berserk.

Afterwards, Kurono charged into Irz Village and thoroughly killed every single soldier of the Crusaders that tried assaulting him. He then met the Priest, Kievan who was leading the Crusaders to attack the Irz Village after cruelly killing every soldier he came across, and realized that Kievan is the one that killed most of his friends in the village. Kurono then tried to attack Kievan who protected himself using a high rank defensive spell after he finished killing the other two magicians with him, Kurono unable to cut Kievan's barrier wished for the broadsword to give him more power. The broadsword then responded to Kurono's wish and started to evolve due to Kurono killing numerous Crusaders and the broadsword absorbing a huge amount of Kurono's black magic power.

Abilities
As a result of its evolution, all of its basic abilities have been greatly enhanced. Its sharpness in particular, has increased to the point that it can easily cut through high-rank defensive spells and even cut through the 8th Apostle, Ai's white aura while her magic power is sealed. Though, it was still incapable of cutting through an Armoured Knight's armour and shield while enhanced with the Martial Art, Guard and the Wrathpun when it was hardening its fur. It also still has the function of giving the user knowledge on how to skillfully wield the broadsword even without having trained how to use it. Just like the Cursed Broadsword, Tsujigiri, it is capable of absorbing the blood of its victims to use it as a catalyst for it to evolve and become more powerful, changing its shape and name along with it.
 * Berserk (狂化 (バサーク), lit. "Mad Influence"): A Bad Status that the broadsword inflicts on its wielder as its curse. It greatly enhances all of the user's physical abilities and removes their ability to feel pain in exchange for driving the wielder mad. The degree of strengthening granted by this curse have been greatly increased thanks to its evolution. Whenever the user is in a Berserk state, their eyes gleams in a red light. Because Kurono uses Blackening on the broadsword, this doesn't normally affect Kurono.
 * Black Calm (黒凪, Kuronagi): Due to its ability to grant its wielder some knowledge on how to skillfully use the Broadsword evolving too, it allows its user to use a Martial Art while using the broadsword. Said Martial Art releases a slash with immense cutting power with more power than the normal Martial Art, Slash.