//------------------------------//
// 151 
// Story: Supernova 
// by Incredible_E 
//------------------------------//

Celestia had a hard time deciding if she should keep the temperature regulation bubble activated to keep Canterlot at a nice seventy degrees or help boost Twilight with the rest of Canterlot.

Ultimately, she chose to deactivate the temperature shield and help Twilight and Canterlot suppress the sun sooner.

She believed everypony could take a little heat in exchange for defeating the sun more swiftly.

Disengaging the regulation spell, Celestia cast the donation spell on Twilight. Luna, once supporting Celestia, lent her help to Twilight. Instantaneously, the purple blast creating the spherical prison got larger and stronger. Nopony saw, but it slowly wrapped around the sun even more.

Unfortunately, it was too late, the sun had grown large enough to render the advanced spell useless. The spell peaked and shattered.

With the bubble gone, a massive change in temperature flooded into Canterlot. Some ponies could not handle the sudden change and fainted — from room temperature to a preheated oven in a flash — weakening Twilight's ability to counteract the sun. 

The violent star grew more as time passed, becoming redder and hotter.

With the temperature regulation shield over Canterlot gone, Twilight's legs began to wobble in their weakness, and her grunts of agony continued and got worse. With no heat protection, Twilight's fatigue overcame her.

"Can't . . . complete . . . spell . . . tired . . . so sorry . . ." is all Twilight could get out before collapsing to the ground unconscious. Everypony's spell was automatically terminated when she fell.

Without any resistance, the sun became exponentially deadly and soon collided with Equus.