I have a low level egg on fjorder I got it bye pumping speed and health and grabbing the first egg i saw mama and papa was not pleased. I have not hatched it yet because it needs to be rather cold 🥶 and I don’t know where to go which is that cold not even joutenhime or how ever you spell it is cold enough. You could do the almost suicidal mission that I did to get one if you want or wait until you get a hazard suite. Make sure before you enter the cave you only have armer in your inventory so not to get heavy and a weapon if you wish plus a few beds outside the cave entrance so you can reaspawn and get your bag if you die. hope this helps you get a rock drake on fjord.