The Sword of Etheria is an action and role-playing video game developed and published by Konami Computer Entertainment Tokyo (KCET). It was originally released on June 30th, 2005 for Sony's PlayStation 2 as OZ (Over Zenith) (オズ Ozu?) in Japan, and as Chains of Power in Korea, followed by its release in Europe on February 24th, 2006. The game was not released in the United States. It was reprinted in Japan on January 26th, 2006 as part of the "Konami the Best" budget label.
One of Sword of Etheria's main characters is named Leon, a male Katena with a large claw on his left arm. He is technically based on the Cowardly Lion from The Wonderful Wizard of Oz, but since he shares his name with Leon Belmont, Konami tied the two characters together in an Easter Egg: Leon Belmont's costume can be unlocked, which gives Leon the power of thunder.
In addition to Leon Belmont's costume, other costumes from other Konami series can be unlocked as well. These include three costumes from Suikoden III characters (Flame Champion, Koroku and Kogoro), one costume from Silent Hill 3 (Robbie the Rabbit) and one costume from Tokimeki Memorial 3.