Corrosive Coins are the repeatable Prey currency added in WoW Midnight patch 12.1. 1,000 coins is $4.49 here, and the counter runs to 30,000.
What they buy:
- Altar of Corrosion upgrades in the Vaults of Atal’Utek;
- the Caustic Venomfang mount from the Skull of Er’inye;
- the rest of the Prey vendor stock, including cosmetics and consumables.
Why people buy them: Ral’kala pays out a capped 500 Corrosive Coins a day. That daily ceiling is the whole problem — a mount priced in the thousands is weeks of logging in, not an evening of farming.
How it is delivered: piloted by default, or Self-play Remote for 30% more. Express and Super Express move you up the queue. Manual play, no bots, PC only.



