Haou Taikei Ryuu Knight: Adeu Legend
English title: Lord of Lords Ryu Knight: Adeu's Legend
Japanese title: 覇王大系リューナイト アデュー・レジェンド
Type: OVA
Episodes: 13
Source: Unknown
Genres: Action, Adventure, Fantasy
Studios: Sunrise
Duration: 30 min per ep
Rating: PG-13 - Teens 13 or older

In an old world clash between light and darkness (as always), the evil Lord Uongadis is sealed away under a gigantic monument called the Earth Blade. 20 years have passed since the wars, and now the threat of evil being brought back is greater than ever as demons try to revive their lord.

(Source: ANN)