When the lighter was relit, Polpo's Stand, Shadow Sabbath, appeared and attacked. Giorno is able to see through Shadow Sabbath's weakness and faces it alongside Koichi. Koichi realizes that the arrow is involved in this situation and they realize that the point of Polpo's exam is to try to create more Stand users.
This is exactly the ability 
that I was looking for!
هذه هي القدرةُ التي كنتُ أبحث عنها حرفيّاً
Genau diese Fähigkeit
hat es doch gebraucht!
¡Es exactamente
el tipo de poder que necesitaba!
Es exactamente
el tipo de poder que necesitaba.
Il me va très bien, ton pouvoir !
È esattamente 
il tipo di potere che mi serviva!
É exatamente o tipo de habilidade
que eu precisava!
Твоя сила делает как раз то, что нужно!