I’ve found the eggs. The eggs are located inside the volcano in an amethyst cave. There are lava pools with groups of magmasaurs in them. There are small islands with craters in them, within those craters the eggs are nestled within. But be careful there are lots of magmasaurs, magma, and what look like varient rock elementals.
For those of you that are raising your very own magmasaur and are too afraid to get a good nights rest in fear of it starving to death. You’re in luck! If it has at least 2,000 food with some ambergris in its inventory/feeding trough. You can safely sleep for 6 hours with no worries.
So after losses.. I've worked out the magmasaurs food drops at a rate of 15 (rounded up from around 13.7) per minute, 900 food per hour. Feed your mag 1 ambergris every half hour to keep a happy healthy lil magma blob
An easier way of obtaining Magmasaur eggs is to level up a Gigantopithiscus in the health and speed catagories, then bolt into the mountain, jumping over the bugs. Once you get to the magmasaur ‘den’ use a whip to gather a few eggs then get outta there
Ok, so after you get yourself one of these eggs from the volcano and get back home, you need to heat it up so that it hatches, then as it’s maturing it will want to eat Ambergris, then as adults they will eat meat and rocks.
When raising the magmasaur the food drain rate is 720 food every hour and you can’t feed it cause it doesn’t hold 5 weight until it runs out of food and starts to drain health on consoles. 1 food is good for about 500 food value. This is all on 1x