The "Stand Arrow" It was first discovered by the archeologist Jonathan Joestar.

His Stand that is known to be the strongest in the world was an ability that he acquired after piercing his body with that arrow.

Around 90 years since Jonathan first discovered the arrow, another five were found in Egypt. There are now 6 arrows in total.

However, after the excavation team discovered the arrows, a young man who was a part-timer in the team stole the arrows and escaped. And thus, the whereabouts of the five arrows are unknown.

Giorno came to know about "the arrow" by snooping into SPW Foundation's database.

He hacked the foundation's database in order to find a way to control his Stand, Gold. E.

He was overwhelmed with a bizarre sensation.

For some reason, he was convinced that Gold. E would evolve if he used the arrow to pierce himself.

While there was absolutely no basis to it, he had a mysterious confidence about it.