FX’s third installment of “American Horror Story: Coven” has been shrouded in mystery — until now. EW gives us these images of new stars Kathy Bates (pictured) and Angela Bassett, while plot detail on the acclaimed series in this week’s issue. The witch-centric “Coven,” shot on location in New Orleans, once again stars Jessica Lange (alongside several AHS alums) but in a much different role from last year’s glum Sister Jude on “AHS: Asylum.” Eventually, we meet society woman Madame Delphine LaLaurie, a historical figure known for torturing her slaves. The Coven version of LaLaurie, as played by Kathy Bates (pictured), is equally terrible (she even uses slaves’ blood as wrinkle cream: Mister Man!), which makes her an enemy of voodoo queen Marie Laveau (Angela Bassett).