After gathering the Elements of Harmony from the library, the group started off towards Ghastly Gorge with Twilight "explaining" on the way the reason for stopping there. "When Rainbow Dash was originally caught in that rock slide back then, it might have shaken loose the rocks in that area. It may be dangerous to walk there now, but if there's a magic tool there, then we have to take the risk." Knowing that this was a lie, Twilight felt bad about misleading the other ponies. It was a necessary evil she had to take though, for Rainbow Dash and her alone had to discover the secrets of the ruins.
"So if the Elements start acting up, then we'll know we're close?" asked Rainbow.
"Yes, that should mean we're on the right track. Fluttershy, Rainbow Dash, could you fly above and scan the surrounding area for anything suspicious? Your elements will pick up any magic resonance in the area." She winked at Rainbow Dash.
"Yes ma'am!" shouted Rainbow as she flew off through the trees. The shock of hearing Rainbow yell startled Fluttershy, but she soon followed at a much slower pace.
Flying through the trees at breakneck speed, Rainbow Dash was thinking about all the possibilities that might be waiting for her should the team succeed and find the ruins they were looking for. Maybe she'd become an alicorn like Twilight, or maybe she wouldn't be able to control her new power. The thought of so many different outcomes was hurting her head, so she resumed flying and kept an eye on her Element to see if anything was happening to it. Nothing. It was still the same red color with its same lightning bolt shape. Nothing out of the ordinary at all.
Then it found something.
Her Element began to glow in a cyan color around its edges, and it began to heat up. Nothing that would burn Rainbow, but enough to where it was a noticeable change. As she neared the end of the gorge, about the point where the rockslide occurred, the Element turned white. The entire piece glowed in a white, blinding energy. Thankfully, Dash brought some sunglasses.
After landing, she moved over to the rock that had crushed her wing before. It had some strange sigil on it, which the Element started to react to. The Element left Rainbow's neck and began floating in front of the stone. Dash tried to move it, but it remained stuck, floating in midair. Seeing that it was a lost cause, she decided to fly back through the gorge to tell the others. Fluttershy was barely half way there when she saw Rainbow Dash go streaking by her. She was about to "shout" after her when she noticed something odd. Rainbow's element was missing. Seeing no point in moving any farther, Fluttershy turned around and started after Rainbow Dash.
As the other ponies kept walking through the bottom of the gorge, they noticed a blue speck getting closer and closer. The last indication they needed to get out of its way was a sonic rainboom exploding behind it. Applejack, Twilight, and Pinkie got out of the way, but Rarity was too busy complaining about getting her hooves dirty in the gorge and was knocked into the air by Rainbow Dash as she slowed her speed. Rarity landed in a bigger mud puddle off the path, and started screaming. Everypony thought she was just over reacting to getting dirty, so they laughed and waited for her to resurface.
She didn't.