Here's why:
* Vault codes are for real-life collectible cards: Vault codes are used to redeem physical Yu-Gi-Oh cards, not digital ones. They are part of special promotions and events, not a system for acquiring any specific card.
* "Rapid Horseman" is a specific card: "Rapid Horseman" is a real card, but you can't unlock it with a "vault code." You'd need to purchase the card or get it from someone who owns it.
* There is no universal code for obtaining cards: Yu-Gi-Oh does not have a system where you can enter a code to unlock a specific card.
How to get "Rapid Horseman":
* Buy it: You can purchase "Rapid Horseman" from reputable Yu-Gi-Oh retailers online or at your local game store.
* Trade for it: If you have other Yu-Gi-Oh cards, you can trade them for "Rapid Horseman" with other players.
* Get it through special promotions: Occasionally, Yu-Gi-Oh may offer "Rapid Horseman" as part of special promotions, but these are limited and not guaranteed.
Please be cautious about websites or offers that claim to have "ultimate vault codes" or similar promises. They are likely scams trying to get your personal information or money.