Being a spellcaster in Bethesda Softworks' The Elder Scrolls IV: Oblivion can get a little pricey. Acquiring new magic can cost an arm and a leg through guilds. Today, the developer announced that sorcerers can expand their library of spells through the game's random treasure generator for just $1 on the PC and Xbox 360. The new download, Spell Tomes, adds books with "wondrous and powerful magic spells," to randomly generated loot picked off of fallen foes or treasure chests. Spell Tomes for the PC requires version 1.1.511 to work.