Keeper of the Valley appears in Yu-Gi-Oh! Speed Duel: Battle City Finals, a 2024 set celebrating the iconic Battle City tournament arc from the original anime series. Speed Duel formats have carved out a dedicated following within the broader Yu-Gi-Oh! community, offering faster gameplay and introducing fresh takes on classic cards and characters. First edition releases remain particularly sought after by collectors building comprehensive sets and pursuing the earliest printings of modern products. This card draws appeal through its connection to the beloved source material and its role within Speed Duel competitive and casual play. Collectors of Yu-Gi-Oh! pursue cards from this era for both gameplay depth and nostalgic significance, making first edition copies especially desirable to those invested in the game's ongoing evolution.