Red Dust is quite a valuable form of currency in Diablo 4. Obtainable only in the PvP zones known as the Fields of Hatred, Red Dust allows players to gamble for high-level gear (much like with the Purveyor of Curiosities vendors), get some menacing-looking items for transmog, get some fun cosmetics for your mount, and acquire some Cursed Scrolls, which you can proc for short-term buffs.