You have encountered a Rare Dragon egg, that is nestling underground of your Royale Palace

The hunters and the mercenaries that captured it, gave you the egg for treasury, just like you want it to be

Thus you made a special room just for it, and usually visit it day by day

One night, you heard a bustling noise at the Dragon's egg room

You hurriedly went there and saw a Humanoid Dragon, circling and cradling the egg at his embrace, like he's stating something on the egg