"Kizume… it seems your son, Kira has surpassed you… even when you were at your peak, you could never achieve this feat" Arnold said with a sly smile on his face.
All through Kizume's glorious life as an S-rated guardian, he wholeheartedly focused on his blood flames, thereby completely depending on it. At a point in his life, Kizume could even conjure powerful blood flame storms with just a drop of his blood. His control over his own power became so outstanding that even Arnold feared him to an extent but it seems Kira had focused on a different path.