Murder Beam

The Murder Beam is a beam from Super Metroid that can only be obtained by exploiting a glitch. It is a combination of all the beams in the game, including Charge Beam.

The Murder Beam simply creates a pillar where it was shot. Any enemy that comes in contact with it is hit, and the pillar remains until Samus leaves the room or overwrites it with a Charge Beam + Power Bomb combination (Not with the Murder Beam). This makes the Murder Beam very effective against respawning enemies and a few bosses. It's most noteworthy use is against Mother Brain, where it is able to continue attacking Mother Brain all throughout the cutscene, practically killing Mother Brain by the time Samus recieves the Hyper Beam.

The damage of the Murder Beam is the same as Power Bombs, and the damage type is considered a Charged 'Power Bomb' Beam. This has nothing to do with the Charge Beam + Power Bomb attacks, those are still considered Charged Ice/Wave/Spazer/Plasma Beams. With the Murder Beam, the game actually thinks that Samus is firing a charged Power Bomb. This is usually irrelevant because most of the time, enemies only care that Samus is firing a charged attack. However, it causes odd effects with freezing some unexpected enemies, such as the Gold Torizo, and failing to freeze others, such as Yapping Maws.

The Murder Beam will crash the game if you fire an uncharged shot, or attempt to use a Charge Beam + Power Bomb attack with it. It will also crash the game if you fire the shot to the right, or fire the shot while spinjumping. There are two methods to charge the Murder Beam without firing an uncharged shot. The simplest is to charge a safe beam, then switch on the Murder Beam in the pause screen. A faster method is to turn on the X-ray Scope then hold the fire button. Samus will charge her beam without firing an initial shot in this situation.

There are five slots for Samus's projectiles (not including bombs). Normally, this is not very important because shots can quickly accelerate past Samus and dissappear off screen, so it is difficult to attempt to fire more than 5 shots at once. However, each Murder Beam takes up a slot in the projectile array. Firing five Murder Beams means that Samus is unable to use her main weapons. Also, Murder Beams will not dissappear even if they are offscreen; Samus must leave the room or overwrite the Murder Beams with a Charge Beam + Power Bomb attack.

There are two very interesting applications of the Murder Beam: Full-Screen Murder Beam and Semi-Frozen Murder Beam. There are no specific uses for either of these, but they are still formidable tools.

Full-Screen Murder Beam
When the Murder Beam is used on a screen where there are respawning enemies, and the respawning enemies are currently dead, the Murder Beam will affect the respawning enemies regardless of where they are on the screen. However, if the enemies move far enough away, the Murder Beam will not affect them. The exact dimensions of this effect are currently unmeasured. There is no known way to affect non-respawning enemies with the Full-Screen Murder Beam. It has been noticed that the turrets in Tourian seem to treat the Murder Beam as a horizontal barrier rather than a vertical one, however. The reasons for the Murder Beam's ambigious borders is unknown.

Semi-Frozen Murder Beam
Because the Murder Beam contains the Ice Beam, it will attempt to freeze any enemy it touches. If Samus does not currently have the Ice Beam equipped, however, enemies cannot be frozen because the required pallete is not currently saved in ram. Freezable enemies will still be hit repeatedly, but cannot be killed because the Murder Beam will not kill a freezable enemy unless it is frozen. However, in this state, enemies do not damage Samus, but instead switch rapidly between frozen and intangible.