Easy way to get high level Magmasaur eggs Fjordur:

What you need:

Desmodus

Rifle or any form of long distance weapon

Lots of ammo ( around 200-300 just to be safe )

1. At night use the cloak ability on your desmodus to sneak into the magmasaur cave unnoticed.

2. Find the high lvl eggs ( they’re usually the most guarded eggs )

3. Latch onto the roof with the desmodus and equipt your rifle.

4. Shoot and kill any magmasaurs guarding the egg

5. Steal the egg then fly out of there as fast as you can.