Easier way to get the eggs is to just tame a desmodus. Run into the bat cave, run out and lure them all out with u and fly away on whatever flyer you have. Then, have bloodbags prepped and just let them pick you up, they only eat 10 at a time before dropping you so have parachutes. Then after that get a hazmat suit, teleport to asgard and do as you would assume. Do not fight the rock drakes just run and latch to get away. Hope this helped!