The Death Demon Swordsmanship.
The strongest swordsmanship, that was ever known to be created by none other than the first Apostle of the Demonic Emperor, the Eternal Golem.
The Swords Style was created with the aim to kill, there was no intention except killing the opponent.
Once the sword is drawn, an opponent must die before sheathing it, that was its principle.
It's a type of swordsmanship that all swordsmen in the tower would do anything to obtain.
But in actuality, the Death demon sword style was derived from the Heavenly demon Swordsmanship, which was used by the Forgotten legend.
But since the Forgotten legend never took any disciples, the heavenly demon swordsmanship was thought to be lost in the passing cycle of time or at least that's what the residents of the tower believed.
Forsaken by the Gods, I made a contract with the Demon King