I have watched Season 4 of Merlin and it was unbelievable ! The new uber villian of Season 4 is Malcolm, a magical court jester who becomes nearly unstoppable after stealing the mystical Kyragem ! He becomes a magical God and turns Uther to stone.
Merlin is unable to reverse the magic. But you guys will be in awe of how powerful Malcolm is. He needs the help of the wise old dragon to defeat Malcolm. Eventually they make their way to Malcolms fortress where Brandon, I mean Merlin, confronts Malcolm and uses a mystical mirror to turn him into stone.
The cliffhanger is that Malcolm gets freed from his stone prison and from what I saw of the Season 5 trailer, we get to play as Malcolm, I mean he is the center of attention, not Merlin.
Anyways, yeah, fantastic series this one.