Plasma Beam

The plasma beam appears in all of Samus's games, except for Metroid Prime 2. It fires molten globs of magma at an accelerated pace that incinerates all enemies. It has a rapid fire capicity and can be upgraded to a flamethrower by way of a missle combo.

When charged up, it has the potential to disendigrate enemies. Samus found this very effective aganist space pirates in all games.