User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-79.115.75.190-20150928152406/@comment-79.115.75.190-20150929104951

Gadreel was weaker than Castiel in season 9 .I don t know how he was a grigori, he was stronger than lower angels ,but Castiel beat him. And even if he had a sword that can kill Lucifer, Lucifer can only snap his finger and kill him like he done with Castiel in 5x22