Hiiro learns the magic spell of the Kokuu blade, a weapon which will strike an enemy from afar.  Hiiro is far too terrible a swordsman to put it to use, but Master Theo notices that he has incredible power.  Theo realizes that not only is Hiiro keeping Dagan Zot's heart in check, Dagan Zot is the only thing keeping Hiiro's heart from going out of control...
Just teaching him swordsmanship 
was the right move.
تعليمه السيف فقط كانت فكرة صائبة
Es war gut, dass du ihm nur
Schwertkampf beibrachtest.
Solo enseñarle la espada fue lo correcto.
Solo enseñarle la espada fue lo correcto.
de te restreindre
au maniement de l’épée.
Hai fatto bene ad insegnargli 
soltanto l'arte della spada.
Ensinar apenas esgrima
 a ele foi a decisão certa.