Sapphiron Egg

[kadrzys]

I'm not there yet but saves are very useful in this game

[Calinda]

The portal opens only once and if you leave you can never go back there.

[Zhuangzi]

You will need to reload an earlier save. This is an example of a couple of occasions in the game when you only get one chance at something. The giant fish in Underground Sea is another example.

You don't need to fight anything in Ultrax. It's quite easy to steal the eggs from the dragons and run away.