As everyone got back home, suddenly Cozy Glow facehoofed.

"Doh! I just realized something." Cozy Glow said.

"What's that?" Lola asked.

"This entire time I could've just used my necklace to get everyone back home." Cozy Glow said. Lola looked at Cozy Glow with a questioning look.

"That necklace doesn't even have that power." Lola said.

"Want me to prove it? I'll show you." Cozy Glow said and focused her mind. Suddenly her necklace grew into a bright light before suddenly a portal to what looked to be a version of equestria; namely the Sombraverse version of it; suddenly appeared before Cozy Glow closed it with a wink. Lola's jaw had dropped to the floor.

"Wait if you can open portals to other worlds, maybe you can use it to get to the human world too!" Sunset exclaimed.

"Huh...I didn't think of that." Cozy Glow said and focused her mind once more. But nothing happened.

"...Eh...that was a long shot..." Sunset said.

"What makes you say that?" Luster Dawn asked.

"My guess is is that equestria is now fully barred from ever interacting with the human world again. Or at least that's my best guess." Sunset said.

"I guess when mirror got it's power drained, it must have closed access altogether. Or at least that's how I see it." Luster Dawn said. "Unfortunately, we may never know the truth." She added but then Cozy Glow got another headache. "Cozy Glow!" Luster Dawn said before going over to her just as the headache stopped.

"I'm...I'm fine...but more importantly..." Cozy Glow said before turning toward the human versions of the main 6 plus sunset. "I know why I'm cut off from the human world: Something is happening there that's going to change it completely, and everything you know will be gone. By the time any link could be established again, you seven will be the only survivors left. Seems that entire world is going to have a type of collapse." Cozy Glow said and then held her head in confusion. "But how do I know that? How could I possibly know that?" Cozy Glow added.

"Now this is just freaky...first Cozy Glow gets a headache that tells us why it's best not to change anything in other versions of equestria, and now she gets a headache telling the human versions of ourselves why access to their world is cut-off." Pony Rainbow Dash said.

"I wish I had an answer for why I'm getting these headaches that are giving me all this information myself." Cozy Glow said. But then she had a thought and grasped her necklace. "Wait...do you think my necklace is responsible? Could whenever I get a headache be my necklace somehow giving me that information?" Cozy Glow asked and turned to Lola. "You said it yourself that this thing is from another universe altogether, and being in our world has given it the power to open portals to and from other worlds. I don't think it giving me this information in the form of headaches is too much of a stretch." Cozy Glow explained.

"Well...that is a very likely explanation. And my father has witnessed all kinds of mysterious unexplained occurrences like this before, so it wouldn't be out of the realm of possibility. In fact, I wouldn't put it past the way the multi-verse works for your theory to be the correct one. Sometimes a little Arkum's Razor is a good thing." Lola said.

"Arkum's Razor?" Pony Rainbow Dash asked.

"Arkum's Razor is a philosophy that says that the theory with the less amount of assumptions is usually the correct one. In other words, it means that the simplest explanation is going to be the right one nine times out of ten." Lola explained.

"I normally don't get a lot of things, but that actually was pretty simple." Pony Rainbow Dash said. "Arkum's Razor huh...gonna have to remember that one." She added.

"Didn't think I'd live to see the day..." Pony Applejack said.

Author's Note

So yeah, in case anyone who reads this story and read the events of "The Vault Of Secrets" and wondered why Cozy Glow didn't use her necklace to get everyone home well...now you know: She wasn't thinking about using it. Though this thought will actually get shot down next crossover. Just you all wait.