Two months have passed since the incident, and still RD hasn't gotten back to normal. It is clear now that she never will, unless something happens that completely blows those memories out of the water. She had stopped clearing the skies above Ponyville, other pegasi were taking care of that now. All Rainbow would do was sit on a cloud or in a tree and just stare downward, a horrified look on her face. She couldn't sleep, for whenever she tried, she would just wake up screaming from horrible nightmares. Nightmares consisting of her being in Rarity's place when the black alicorn chainsawed her in half, or having diamonds impale her all over her body.
The lack of sleep along with the nightmares was driving Rainbow insane, she tried therapy to help get over the sight, hypnotism to try and get some sleep, nothing would work. The images of her friends' mangled corpses just wouldn't go away. Which led her to only one conclusion; the alicorn had planned this all along. For the images to last in Rainbow Dash's brain until either she or the alicorn were dead. Rainbow decided that the only way to rid herself of the terrible dreams and memories, she would have to return to the Everfree forest, and kill the alicorn.