Twilight considered how to continue, "Alright, good. Telling them may cause unnecessary panic."
"What was this spell you used?" she continued. "We need—"
Twilight was interrupted by Celestia's audible struggle in maintaining the temperature regulation bubble. Looking upwards, the sun had become a giant red ball.
"It is getting too hot out there . . . the temperature shield is becoming too much for me to handle," Celestia stated through her grunting.
Since Twilight did not know how to make the amulet Celestia spoke of, nor the spell, she decided to join Luna in helping Celestia with the bubble. Her horn lit up and cast the same spell to share the burden. It worked for a moment, but with nothing holding back the sun it grew exponentially. It filled the sky with its red glow as if it were setting for the last time.
Instead, the heat overpowered the princesses, shattering the temperature bubble, and then the planet.