Leviathan!Castiel

300 px
Name	???
Actor	Misha Collins
Dates
Location
Occupation	Leviathan
Episode(s)	7.01 Meet the New Boss 7.02 Hello, Cruel World 7.06 Slash Fiction (referenced) 7.23 Survival of the Fittest (referenced)

"Oh this is going to be so much fun!"

Leviathan!Castiel refers to the conglomerate of Leviathans occupying Castiel's vessel, Jimmy Novak during and after his Godhood.

Appearances

7.01 Meet the New Boss & 7.02 Hello, Cruel World

"Too late! Cas is umm... he's gone! He's dead! We run the show now."

Castiel opens a door to Purgatory and absorbs all the souls residing there. He then uses this power to obliterate archangel Raphael and declares himself a new and "better" God. Over the course of several months Castiel performs many miracles and selfless deeds in his efforts to bring peace and order back to the world. Eventually, the Leviathans begin to stir within Castiel and demand to be let out. Castiel refuses to acknowledge them, however, and continues his campaign of righteousness. The Leviathans take their toll by eroding Castiel's vessel, causing him to black out and gaining control of his vessel for a brief moment.

When Castiel comes to his senses, he realises the carnage the Leviathans have wrought and seeks out Sam and Dean's help in returning the souls to Purgatory. This is only partially successful, however, as the Leviathans succeed in "holding on" inside Castiel and soon after take full contol of his vessel, declaring him dead and gleefully attacking Dean and Bobby. Before the Leviathans can finish them, however, Castiel's vessel begins to rapidly deteriorate and oozes black blood. Knowing it cannot contain them all for long, the Leviathans abandon Dean and Bobby with the promise to return and directs the vessel to a nearby water supply. They then submerge the vessel and it implodes, releasing countless Leviathans into the main water supply. Castiel and his vessel are gone, leaving only his tattered trenchcoat behind, which Dean retrieves.

7.06 Slash Fiction

The Leviathan Chet reveals that as a result of all the Leviathans possesing Castiel in this manner, they have absorbed all of his collective knowledge, giving them an advantage in tracking the Winchesters through their aliases.

7.23 Survival of the Fittest

Meg and Crowley reveal that as a result of all the Leviathans possesing him, the resurrected Castiel posseses the ability to tell the Leviathans apart no matter what form they take. This proves the key to killing the Leviathan leader Dick Roman and defeating the Leviathans.