Demon beast egg

It was a well-known fact that all demon beast eggs came with expiry dates and must hatch within a certain period of time. Otherwise, these eggs wouldn't be able to hatch and stay buried under the ground for a long time, ending up becoming a fossil. Some would rot whereas some would miraculously survive the lapse of so many years, but at the cost of consumption of vitality.

If these eggs had hatched countless years ago when they were supposed to hatch naturally, then the newly born demon beasts would have probably taken birth directly in the legendary realm or in a realm even above that.

Moreover, it was said that there should be more than one egg buried under the ground. This spread a wave of joy and excitement among the human experts and consequently, they rushed to capture the remaining eggs. Even one such egg would be a very big harvest.