Some spoilers for Jojo's Bizarre Adventure Part 5:
Gold Experience Requiem provides Giorno with a massive increase to speed and power, including the ability to levitate. It additionally enhances the power and range Giorno's original powers of giving life to inanimate objects, such as being able to blast a stone pilar into pieces and individually turn each of those pillars into scorpions to attack his enemies. Gold Experience Requiem also has massive healing and regeneration powers. Additionally, Gold Experience Requiem can operate independently of Giorno's consciousness.
Its ultimate ability reverts all of his enemies' actions and their willpower to the state of "zero" or "nothingness". Essentially, this can be thought of as "undoing" reality to a state where the opponent's will and actions no longer exist. The opponent then has their death "turned to zero", putting them in an infinite loop between the exact point prior to death and death. This ability is passive and can activate automatically when Giorno is attacked.
