Elder Scrolls IV: Oblivion - Knights of the Nine includes all the Oblivion downloadable content released to date: Horse Armor, The Orrery, Wizard's Tower, Vile Lair, Thieves Den, Mehrunes' Razor, and Spell Tomes. There's also a new faction and quests for noble characters that will answer the questions surrounding the Ayleid ruins found throughout Oblivion. Battle against a sorcerer-king and his demonic minions while exploring massive dungeons and searching for legendary relics: The holy armor and weapons of the Divine Crusader.