Yu-Gi-Oh! - Caius the Mega Monarch (SECE-EN035) - Secrets of Eternity: Super Edition - Unlimited Edition - Ultra Rare A single individual card from the Yu-Gi-Oh! trading and collectible card game (TCG/CCG). This is of Ultra Rare rarity. From the Secrets of Eternity: Super Edition set. You will receive the Unlimited Edition version of this card.