Celestia to Discord:
You win, Discord. After all this time, you finally won.
Thank you!
Nothing happened.
Literally, nothing happened at all.
The universe had died eons ago. The black holes had long since evaporated. Neutrons had decayed. Energy had dissipated into nothingness. Nothing happened.
Nothing could.
And then something did. Celestia, who still existed to this time, finally expired, consumed by Discord's ultimate chaos.
And she was glad. As was Luna.