Where is the Magmaul in Metriod Prime Hunters story mode

Look it is on the planet Alinos (typical isn't it?) in the high land place at th very top there is a door that you need the judicator (ice beam that you get in the planet Arcterra) open the purple door continue at one point you'll see sylux's ship go after it get over the next place till you get past the lava place there is a door open it when you open the other door there will be three guardians defeat them in the lower place there is a door go in there continue when you see a lava lake a fire monster will appear it's name is fire spawn, after you kill it the magmaul will appear in the room.