Overlord Season 1, Episode 12, "The Bloody Valkyrie," features a climactic battle where Ainz Ooal Gown confronts the mind-controlled Shalltear Bloodfallen. The episode is available to stream legally on platforms such as Crunchyroll , Hulu, Tubi, and The Roku Channel. Viewers are encouraged to use these official services to avoid security risks associated with unauthorized sites.