Burn
Cas stood there, staring at Dean and Bobby. He had fire in his eyes. Sam stood behind him, scared at what was happening.
"Bow down to me." Cas said. "And I will spare your lives." Dean looked over at Bobby.
While they were exchanging looks, a spot under Sam's shirt turned red. Grey smoke started to pour out from the flannel fabric of his shirt. Suddenly, a burning pain hit Sam's chest. He started to scream.
"Sam?" Dean asked as he heard Sam scream. Sam pulled at his shirt in order to get the burning away from him. Dean went to walk forward but Cas stopped him. He pushed him back towards Bobby than walked to Sam.
"What you got hidden there sonny?" Cas asked. He pushed Sam against the wall and started to rip at his shirt. Dean was scared. Sam had just woken up and now he didn't know what was happening to him. Suddenly, he saw it. The necklace he had thrown away so long ago was right there, hanging around Sam's neck…and it was glowing bright red and burning. "See, I am God." Cas said. He ripped the necklace off of Sam neck and held it up. Sam slid down the wall from the blunt force trauma delivered to him from Cas slamming him into the wall.
"What the hell?" Dean said. Cas looked at him.
"Now Dean, are you going to swear your allegiance to me, or do I have to kill your brother, your friend, and then you?" He asked. Dean looked at Cas, then Sam, and finally Bobby. He had an important chance to make.
The End?