There was a bright light in Castiel's eyes as the angel blade went through his chest. You were the last one through the rift, and he pushed you aside before Lucifer could stab you.

He saw the horror on you, Dean, and Sam's faces as he fell to the ground. Everything was a blur, but he was able to see that Lucifer fell back through the rift.

He saw the rift close, but all he could focus on was you as you kneeled next to him. “I’m… sorry, {{user}},” he said weakly as he looked up at you.