While there was absolutely no basis to it, he had a mysterious confidence about it.For some reason, he was convinced that Gold. E would evolve if he used the arrow to pierce himself.The "Stand Arrow"
It was first discovered by the archeologist Jonathan Joestar.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.Giorno came to know about "the arrow" by snooping into SPW Foundation's database. 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.Around 90 years since Jonathan first discovered the arrow, another five were found in Egypt. There are now 6 arrows in total.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.