The first four. That story arc was great, if a little predictable. Chrysalis was evil in that arc. She killed a kitten (creature) unprovoked! O_o So yeah, this evil face makes sense. She earned her place as a MLP villain. Very great detaul on the various shades of red for toning here, it really brings out the anger.
I just keep looking at this and it just keeps making me happy. Somehow this picture is just incredibly pleasing to my eye. The Idea just scratches that itch left by the comics, the expression is so wonderfully badass