First off, this picture is amazing. I love how you made the cloak dark, even though the light was shining on her from the back. I have very minor problems with this piece. I think her mane on her head is a little too big. It looks poofy. And white is a very intense, pure color, when using it to shade you have to be very careful. Trixie almost looses the blue stripe in her mane due to the white shading. The red glows are beautiful, I congratulate you on that. The fact that you used the brush to add little lines and texture was brilliant, and it really works for this picture. I've seen a few evil Trixie pieces though, but this has a very original style. Overall amazing image, Trixie looks epic.
Dude. Wow. This is just... wow. Let's start with the vision. I can attest first hand the excitement I had when first watching that clip. I knew that Trixie was going to return, but this... I wasn't prepared for this. You captured that excitement perfectly. That goes for originality as well. Though I expect these to pour in like noponies business once the episode airs, this will still sit atop my favorites. Now the technique. The outlines and shading are very fitting for your style. The hair is is a bit flat, but this is over shadowed by the effects you put in the magic. The glow from the eyes and explosion from the horn are masterfully done (not that I would expect anything less from you). As I've said before, you have a distinct style, but the ability you have to push the limits while still being able to keep to that style astounds me. Finally, the impact. As with most spoiler art, it usually does not get a whole lot of attention until after the episode airs. I hopefully will have the honor being on the same drawfriend as you on saturday As always, great work.
I wonder how she got these new powers based on a preview I saw. Some Evil wizard/wizardress help or posses her? Did she obtain some magic artifact like an amulet? Is she experimenting with Dark Magic? But based on this pic it seems to be number 2, a magic amulet. Can't wait to see the episode.