In Supernatural, the Winchester brothers have faced some of the worst and most powerful villains in fictional television. Despite being mortal with nothing more than just their wit and their brawn, they have taken down Nigh-Omnipotent beings like Archangels , The Mother of all Monsters, Death himself, and, of course, Lucifer.

But let’s face it, since the end of the iconic fifth season when the Winchesters were successful in putting the Archangel Michael and Lucifer in the cage, Supernatural has struggled to find opposition that could effectively top the Devil and the Leader of Heaven’s armies.

It looks like the eleventh season may bring us one.

In the end of the tenth season, the brothers unwittingly released the Darkness, an evil that God himself defeated and locked away long before creation began.

But what exactly is this Darkness? Jensen Ackles, who plays Dean Winchester, had this to say:

As of right now we have it built as one specific entity, obviously that would be a character that we’re introducing […] But whatever the reach of that character, what that character can do, we’re not quite sure of […] We don’t know the scope of her powers.

Jensen then went on to describe the form it would take:

This one’s interesting because it’s not really a monster. It’s more of a primal force that we know nothing about. There’s no lore; there’s no guidebook; there’s no instruction manual on how to deal with this.

Supernatural will premiere its eleventh season on Wednesday, October 7 at 9pm on the CW.