Supernatural: Every Major Villain Ranked Worst To Best
4. Michael (Alternate Reality)
Michael was always one of the most dangerous archangels rivalled only by Lucifer.
This becomes even more so apparent when an alternate version of him, from the Apocalypse World, winds up in Sam and Dean's timeline.
Similar to the original Michael, Dean was a natural host for this angel of war when the two teamed up to put an end to Lucifer once and for all. This proved to be a trick as after they finally killed Lucifer, Michael sought to completely take over Dean as a vessel.
This version of Michael also has one of the most impressive list of kills of any villain, mainly due to the violent takeover of his own world. Apocalypse Michael has managed to defeat Gabriel, Lillith, Anna, numerous hunters, and Lucifer (twice!).
Though Michael was eventually defeated by Lucifer's son, Jack, he proved to be arguably the most powerful angel that Team Free Will ever had or ever would face.