Sacrifice Miyu and save the world... The Ainsworths' true objective is to use Miyu, the Holy Grail, to save all mankind. The new turn of events sends Illya into confusion. Kuro rushes to her aid, immediately saying she values Miyu more than some parallel world. Meanwhile, with the fate of a world and Miyu hanging in the balance, Illya struggles to find her answer...
How to use the old world's final, grand spell
Tras reunir todo el
mana del viejo mundo,
Tras reunir todo
el mana del viejo mundo,
Il faut se servir de la dernière
grande magie de l’ancien monde.
Dopo averlo raccolto interamente, quale sarà
l'ultima grande magia per cui lo utilizzeremo?
Depois de reunir todo o 
mana do planeta antigo,