The Miyoshi brothers have powerful regenerative capabilities.  They say that taking life is offering salvation, and in them Shungiku sees his own younger self.  Oooka, who knows the old Shungiku, is doubtful he can win the battle.
Because he thought his 
father killed his mother.
Cuando creyó que su padre mató 
a su madre y lo persiguió,
Cuando creyó que su padre había 
matado a su madre y le persiguió
Porque ele pensava que seu 
pai havia matado sua mãe.