It's all about the battle for supremacy in the tenth episode of American Horror Story: Coven, made ever more magical with the guest appearance of Stevie Nicks, as a witchy Stevie Nicks. Entertainment Weekly reports that two young witches are victimized in the quest for power, while legendary rock goddess Stevie Nicks sang two of her major hits on the show.

Entitled, "The Magical Delights of Stevie Nicks," the much-awaited 2014 episode opened with a scene showing two powerful witches - Fiona Goode and Marie Laveau- finally agreeing to work together against witch hunters. However, just when it seemed all the witches were going to work for a common cause, the battle for supremacy within the coven ensues.

First off, Fiona brings in the Stevie Nicks to prompt Misty Day in showing her supreme powers. Misty faints upon meeting her goddess and as the rock legend sang "Rhiannon" Misty seemed totally, absolutely lost in worship.  Fiona declared Misty to be the next supreme, and Stevie even offered her a shawl. Meanwhile, the other girls couldn't care less about the Fleetwood Mac legend, as Madison said she's more inclined to listening to Eminem.

Hollywood Life notes that Madison later lures Misty into spending time with her at a funeral, seemingly advising her about securing her original, very own witch identity without any influence from any rock goddess. Just as Misty was about to assert herself to the witchy Hollywood bitch, Madison Montgomery strikes Misty Day on the head with a brick, pushes her onto the open casket and has her buried alive in a mausoleum.

Meanwhile, Fiona, Marie and Delia discover information about the witch hunters and their network. Fiona castigates Cordelia for failing to sniff out Hank's rotten agenda, and proceeds to sabotage Delphi Trust and its head, Harrison Renard. The Supreme and the Voodoo Queen succeed, and Delphi Trust is brought to its knees with the FBI investigating the company. Renard vows vengeance.

Now seemingly BFFs, Marie finally shares her secret to the fountain of youth with Fiona: it involves a deal with the voodoo chief Papa Legba (Lance Reddick), who grants Marie eternal life and beauty with an infant sacrifice. Fiona vows to do the same thing, and calls upon Papa Legba only to be informed she can't bargain with him because she has no soul, according to TV Line.

Nan, however, changes the gameplan as she declares she is the next supreme because her powers have been growing. Fiona stumbles in on the declaration in perfect timing and sacrifices Nan to the voodoo chief by drowning Nan. Papa Legba accepts the witch sacrifice, she being an innocent, and Fiona succeeds yet one more time.

The episode ends with Stevie singing "Has Anyone Ever Written Anything for You," and Fiona smiling and crying at the same time.