“Are you ready?” asked Princess Celestia to a princess pony.
“I am,” replied the pony.
“Remember, you are to warn your mother and her friends about this condition,” Celestia continued to brief her. “You need to use all of the lessons I taught you.”
“But… what if I die there?”
“It’s OK,” reassured Celestia. “If you’re gone, I can transfer your power into me and I will restore everything.
“Well, alright then.”
“Good luck. There’s no time to lose.”
After that, the pony used her magic to open a portal, which leads to the past.
“Mom, dad, everypony,” said the pony with determination before she entered. “Don’t worry, I will change your fate!” With that she stepped into the portal and was gone.