Fresh from BlizzCon where Steve is working to bring us fresh Blizzard-related information, comes a Diablo 3 cinematic trailer titled "Black Soulstone". Here's the official blurb:
As Deckard Cain's niece, Leah, struggles to make sense of her uncle's mysterious and disturbing notations, she bears witness to a dark vision. Azmodan, Lord of Sin, towers over the fragile young woman, swearing his armies of the burning Hells shall pour forth into Sanctuary, ravishing the world and all hope of resistance.
Check it out below or click here for the HD option