Changes

Castiel told sam Sam that he would have to drink an enormous amount of demon blood before he could let Lucifer inside him when they were discussing Sam's plan on imprisoning him along with himself. All the while, mentioning that Nick is drinking gallons as they speak to continue to contain him as it can strengthen the vessel.

A few years after Nick's death, [[Crowley]] and his demons find his body and Crowley has it repaired and improved to act as a suitable permanent [[vessel]] for [[Lucifer]]. After Crowley corrupts [[Rowena|Rowena's]]'s [[spell]] to send Lucifer back to the Cage, he is instead sent into Nick's body where Lucifer is restrained with chains made from the same material that was used to create the Cage which was discovered after a team of Crowley's twelve most trusted demons studied it. Due to Crowley's improvements upon Nick's body, he shows no signs of degrading from the possession like he did previously and like Lucifer's other vessels aside from [[Castiel]] and [[President Jefferson Rooney]]. ===[[12.15 Somewhere Between Heaven and Hell]]===Crowley revealed that he not only improved Nick's body to act as a permanent vessel for Lucifer, he also had the runes and spell-work from the Cage carved into every molecule in order for Crowley to effectively torture him as well as rendering him powerless and preventing him from vacating his vessel.