Yu-Gi-Oh! - Evilswarm Ouroboros (HA07-EN065) - Hidden Arsenal 7: Knight of Stars - Unlimited Edition - Secret Rare A single individual card from the Yu-Gi-Oh! trading and collectible card game (TCG/CCG). This is of Secret Rare rarity. From the Hidden Arsenal 7: Knight of Stars set. You will receive the Unlimited Edition version of this card.