Warrior or Slaughterer? Showdown: Mifune vs. Black☆Star?.As Mifune fights with Black Star, he asks him whether he will follow the path of a warrior or a demon, recounting how Black Star's father, White Star, chose the wrong path of a demon and Mifune was forced to kill him. Meanwhile, Kid returns to Death City and Lord Death is now ready to explain the purpose of the magic tool, revealing that the final tool contains Eibon's soul needed to operate "Brew" and that Eibon once served as one of eight of Lord Death's warriors in the past. As Lord Death explains that Eibon used the magic tools as part of research for the greater good, Excalibur, who wishes to observe the transpiring events, arrives and reveals that Eibon was obsessed with immortality and was unable to find a way to transcend death until Arachne offered a helping hand. Meanwhile, as the DWMA near Baba Yaga's Castle, Mosquito operates a weapon of mass destruction. Returning to the battle, Black Star refuses to listen to Mifune, who, seeing no possibility of change for his opponent, decides to finish him with a lethal blow. Eibon finally puts the function of "Brew" to work and unlock its power.