Sam (Jared Padalecki) and Dean (Jensen Ackles) may have found the key to taking down the all-powerful Amara (guest star Emily Swallow) in the upcoming episode of "Supernatural."

In "Hell's Angel," CarterMatt reports that Crowley (Mark Sheppard) will see the Winchesters with a plan to defeat the Darkness. Ever since God's vengeful sister arrived on Earth, the brothers have been looking for a way to stop her from annihilating mankind. Amara is determined to get her revenge on God by killing all his beloved creations. Her powers are beyond compare that mere humans will not be able to outwit her.

Sam and Dean have searched far and wide to find the weapon that can send her back to where she came from. Dean even travelled back in time to investigate a doomed submarine and track down what was supposed to be the only thing that could stop Amara. This time, Crowley will come bearing good news. He will tell them, the brothers, that they need to retrieve the Horn Of Joshua. It's not going to be easy though.

Meanwhile, Lucifer (Misha Collins) will travel back to Heaven for the first time ever since God banished him. While there, he will not waste time angering all the angels. In the promo, he is seen rounding them all up for a brief chat. Lucifer tells the angels that they should begin calling him God. Hearing the blasphemy from the loyal Castiel's lips makes it more offending, as the angels' expressions display.

Elsewhere, Amara's quest to delete the entire universe is starting. The teaser shows her calling forth the powers that be to help her with her plans. While Crowley and the Winchesters are speaking and Lucifer is conducting his conference in Heaven, a mighty force causes everything to shake and tremble.

"Supernatural" season 11 airs Wednesdays at 9 p.m. EST on The CW.