Ruler of Hell's blood



Crowley ' s blood is one of three bloods the Winchesters need to kill the Leviathan. Because Crowley is the King of Hell, he is therefore the Ruler of Fallen Humanity. In There Will Be Blood Sam and Dean summon him to Rufus's cabin and ask him for his blood. Crowley agrees, but won't give them the blood until they've collected all the other components for the weapon, because he doesn't want to risk his blood falling into his enemies' hands.

Later at the beginning of the next episode, Dick Roman makes a deal with Crowley to give the Winchesters the blood of a lesser demon in the place of his own, which will sabotage the weapon. Crowley pretends to agree, but gives the Winchesters his own blood instead.

Appearances

 * Survival of the Fittest