When a Dragon Egg (or another rare special block) receives a NC-update, if a special condition is met, the dragon egg will throw a StackOverflowException in order to suppress the block update.

The special condition should be a little strict in order to prevent misoperation. For example:

• The Dragon Egg is powered by redstone from a certain surface (maybe the top surface).

• AND the Dragon Egg is sitting on a certain block.

• AND the Dragon Egg is receiving a NC-update (not PP) from a Powered Rail (not other blocks).

While this idea seems fun too mess with, I suspect you will find more enjoyment in your game by building an actual update suppresor. If you want to make it easier though I do recommend lowering your jvm stack size to one half or one quarter via arguments. This allows you to make your update suppresor perpotionaly smaller.

Already present in core carpet. Use /carpet interactionUpdates false for a simple update supressor.