What is requiem arrow?

What Giorno Giovanna stabbed with to gain Gold Experience Requiem so he can beat the shit out of Diavolo.

Giorno: *stabs himself with Requiem Arrow*
Giorno: Korega Requiem da.
Diavolo: wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- wha- what

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requiem arrow - video