It was an odd dream though, and I wish I had the energy and skill to draw comics from my dreams sometimes.
From what I can tell, a villain was on the loose. There was a scene in a dark castle hallway or something, but I don't remember anything from there. Then there was an icy lake, I was running along the outer rim where there were sheets of ice, and I grabbed Applejack out of the water. A moment later I see Twilight Sparkle ahead, with her back to the lake, acting like she was being threatened by something, defensive and somewhat scared. But when I came closer, I noticed her colors were lighter, and somehow I immediately knew it's not the real Twilight. Without having to think, I swung my katana and somehow mananged to - in a frontal attack - cut off her tail. LOL WTF, why did I do that?! Well, in any case, when I did that, she assumed a slight white-glow and had a wicked-evil grin on her face and that's when I thrust my katana straight through her from top to bottom, leaving a white-glowing line through her still grinning (holographic?) body.
That's when the dream ended.
Or did it?!