The Dark Beam fires a blast of dark energy that can encase its targets in dark matter, in a function similar to that of the Ice Beam. Normal blasts from the Dark Beam take numerous hits to encase its target, whereas the charged Dark Beam, known as the Entangler, can instantly encase a target. The Entangler also spreads to any nearby enemies, either damaging or freezing them. Samus can shatter most encased enemies with Missiles.
Samus can use the Dark Beam to open Portals to Dark Aether. Shields with a light polarity can be overloaded by the Dark Beam. It can temporarily disable Light Crystals. Lift Crystals can also be manipulated through use of the Dark Beam.
The Dark Beam was originally created after the Luminoth discovered the Ing's attacks as dark energy. They attempted to overload the Ing with dark energy, but found that the Dark Beam was less than effective. The Light Beam was developed soon afterward. While it does a small amount of damage against Ing and Darklings, the Dark Beam does a high amount of damage to light creatures.
Despite the lack of effectiveness against the Ing, the Dark Beam was still used by the Luminoth in their war. The Ing came into possession of the Dark Beam after they defeated the Luminoth champion A-Kul. The Space Pirates eventually found the Dark Beam and took it to their base in Agon Wastes. After Samus defeats Dark Samus for the first time, she recovers the Dark Beam from a nearby room. The Space Pirates apparently were using the Dark Beam to open up a rift portal to Dark Aether so they could obtain Phazon.
- Main article: Darkburst
The Darkburst is the Charge Combo to the Dark Beam. It fires a slow moving blast that explodes when it impacts something, generating a void that pulls slower enemies into another dimension in the process.
"When out of Dark Ammo, you can charge the Dark Beam to fire a normal shot. Fire the Dark Beam to deactivate Crystals. Dark Beam blasts have limited effect on Ing and dark creatures. It takes several hits with the Dark Beam to hinder enemies and enshroud them with dark matter. Charge the Dark Beam to fire an Entangler blast. Enemies stuck by this blast will be enveloped in shadow tendrils for a few moments, unable to move or fire. The Entangler costs 5 Dark Ammo to fire."
- "When out of Dark Ammo, you can charge the Dark Beam to fire a normal shot. Fire the Dark Beam to deactivate Crystals. Dark Beam blasts have limited effect on Ing and dark creatures. It takes several hits with the Dark Beam to hinder enemies and enshroud them with dark matter. Charge the Dark Beam to fire an Entangler blast. Enemies struck by this blast will be enveloped in shadow tendrils for a few moments, unable to move or fire. The Entangler costs 5 Dark Ammo to fire." —Samus's Notes (Metroid Prime 2: Echoes)
- "Our studies of the Ing revealed the source of their attacks as dark energy. We built weapons to use this energy, thinking it could overload energy targets and eliminate them. We soon learned our error, as the Dark Beam was not of great effect on the Ing. We then began to develop a weapon that used light energy. This weapon would dispatch the Ing with terrible efficiency." —Luminoth Lore (Metroid Prime 2: Echoes)
- "The Dark Beam can hinder enemies, extinguish Light Crystals, and is effective against Light Aether enemies. Charge it to fire an Entangler blast, which enshrouds enemies in shadow. The Dark Beam can open purple hatches." Metroid Prime 2: Echoes Instruction Booklet, Pg 17
- "The first of our greatest champion's weapons has been found...by the Ing. Find the Dark Beam. Avenge this blasphemy!" —I-Sha (Metroid Prime 2: Echoes)
- "A spatial anomaly has been found within our base. We believe this rift in space-time leads to a parallel dimension of some type, but have been unable to interact with it thus far. A strange artifact was found near the anomaly as well. It may be a weapon or generator of some kind: perhaps it is the key to accessing the anomaly. High Command is eager for reports on the relic. A new weapon for our arsenal is always welcome." —Space Pirate Data (Metroid Prime 2: Echoes)
- "This is a slower shot, but effective on the enemies in light side. When you fire it, you use dark ammo." Metroid Prime: Trilogy Instruction Booklet, Pg 28