FYI ambergris is NOT the only food for baby magmas, sulfur works as well.

To breed them without lava enable mating and continuously hit them with wyvern fire

Latest patched! Now you can raise Magmasaur baby with sulfur!

Pegos are so dumb. Took my crypod with my baby 150 magmasaur and then jumped into the wyvern trench and died 😭

I feel like these guys should be on scorched earth, it would make sense, up of you agree

When it comes 50% age, will eat 0.1 food in sec. That mean 360 food for hour. 4000 Food enough to leave overnight. I hope I helped you^^

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.

Please Note: This tip isn't only Taming, it contains Utility too! I'm on my phone writing this, so sorry if the formatting is bad!

Taming/Raising

To get a Magmasaur, you have to steal one of their eggs, hatch it, and raise it yourself. To my knowledge, as babies they will only eat sulfur. However, as adults, they will take raw meat and can be force-fed to heal like a carnivore. I ran into the cave on Lost Island with nothing on several times and came out with 2 eggs. Please note: They can and will shoot fireballs at you. We haven't tried breeding them yet, but to my knowledge they can breed while in lava.

Utility

AMAZING. They can get metal, crystal, obsidian, and more really well, they can cook it on the go (Drawback: Rapidly drains hunger and disables sprinting,) they can fight, and they can cook meat in their inventory for you (Unsure if they need to be on smelting to do this.) They're also decently fast on the ground.

At full charge, their "Searing spit" (Hold RMB to charge) does high damage and a powerful burn effect. This ability requires metal ingots to use.

If you press space, they will do a taunt that enrages wild creatures. It might do more, but I don't remember. Sorry!

Extra

Originally thought they were all the same color, but I have been proven wrong! Me and a friend on a non-dedicated have 1 Magmasaur each, and I noticed his has blue tail tips while mine doesn't. This is everything I've found out about Magmasaurs so far, and it may not be everything.

On fjordur is you go into the cave at the end of the fire wyvern trench and fly to the nests steal one egg then lead the rest of the magmas under the bridge in that area lead them against the right wall going in with the spikes when there all in there enjoy getting all the other eggs in that area I got lots of eggs doing this

Easiest thing to do is to spawn at the East zone and go to the Egg-Straction mission. Then, take the first left in the cave and you should end up by the nest. A good strategy is to wait until there aren’t any magmasaurs by an egg, then ask HLNA to teleport away, and right before you teleport, grab the egg.