Shin's summons to the castle doesn't go exactly as he thought it would when the princess challenges him to a duel. Then when the aftermath of their fight goes horribly awry, it's up to Schnee to investigate. 
You didn't use it when you tested me.
.لم تستعمليه عندما اختبرتني
Du hast es auch
nicht beim Duell verwendet.
No la usaste para probar mi fuerza.
No la has usado para probarme.
Vous ne l’avez même pas utilisée.
Non l'ha usata quando mi ha messo alla prova.
Nem a usou durante o teste.
Почему не использовали в бою?