i think youve been mislead. youre supposed to get the plasme beam in the fire area (I
forgot the name) where theres a whole lot of lava and stuff. there should be a really big
room somewhere and there are some spider ball tracks on the wall, really high up. also
there are big pillars with platforms which u need to plant a small bomb into the jump
across to the spider ball tracks,where u go a long while on them (dont fall down) to an
ice door whith the plasma beam on the other side.

You have to go to magmoor caverns. There is a morph ball puzzle in order to get the
plasma beam. You will also need the spider ball and the ice beam.