For some reason these guys don’t really seem to detect blood stalkers so they only time these guys get pissed is when you get off not when you hit it. Go into the cave on a stalker that’s got some good health for you’re server and get off, get the egg, book it back cause other wise you’re doomed.
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
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.