"End Flashes" should only appear once the Dragon is defeated

There are two ways to look at this idea:
* The End finally blooming to life after the Dragon is defeated.
* The End losing stability once the Dragon is defeated.

Overall though, this would be a fine addition for the game, and would make seeing the End Flashes much more rewarding.
Also, not to mention that they're currently pretty distracting during the Dragon Fight, so.

Thank you for reading and maybe considering this idea!