Quadraxis

Quadraxis was a massive security drone created by the Luminoth to protect the Sanctuary Fortress. However, the Ing conquered the fortress, and a large number of the dark creatures possessed Quadraxis, taking the immense drone to guard the Ing Hive instead. After Samus Aran landed on Aether and restored power to Agon Wastes and the Torvus Bog, she went to the Sanctuary Fortress to restore power to it as well. In turn she entered the Ing Hive and defeated Quadraxis.

First Phase
Quadraxis, in its first form, uses the Annihilator Beam (normal and charged), missiles, machine guns, and a tornado-like attack similar to the one used by the Quads also found in Sanctuary Fortress. The only difference is that while the Quads spin around the arena trying to ram Samus, Quadraxis will stay in the middle of the arena, attempting to suck her into it. There are multiple ways to dodge this attack. One way to avoid this attack is to get on the far edges of the arena when it begins to start this attack; another is to shoot its feet with a charged beam or Screw Attack into it.

Quadraxis is damaged by destroying its knee joints with missiles or Super Missiles or its foot weaponry with the Boost Ball or Morph Ball Bombs.

Second Phase
Once Quadraxis' legs are crippled, it will collapse in a heap-unfortunately, its head will detach from the body and fight on its own. The head will use a shielding device which receives tactical data from the body. Using the Echo Visor, Samus must destroy the transmitter on the body and attack the 3 receivers on the head. Once one receiver is destroyed, Quadraxis will try to re-establish the lost link, summoning Dark Quad robots in the process. Samus should either ignore the robots or destroy their heads and keep moving so the bodies cannot spin into her. If she takes the time to completely destroy the Quads, Quadraxis will probably re-establish the link to its body and resume its attack.

Final Phase
Once all the receivers are destroyed, Quadraxis will fly around erratically, crashing into its body's legs and dislodging their armor. It will eventually regain control and continue battling Samus, but the bounty hunter's previous assault has disabled its shields and most of its weaponry.

To finish the rogue mechanoid, Samus must attack the head unit until it is stunned, at which point it will slowly circle its ruined body. Using the damaged legs as ramps, Samus must time a jump with her Boost Ball to propel herself onto the floating head with the Spider Ball allowing her to cling to its surface. From here, she can move into one of the two Bomb Slots on Quadraxis' head and lay a bomb to injure the robotic Guardian. Once bombs are dropped in both slots, Quadraxis' head will fall to the ground and explode, leaving behind the Annihilator Beam. Once the Annihilator Beam is acquired, a large platform will rise in the center of the room with Spider Ball Tracks on the side of it, allowing Samus to finally escape the temple.

Logbook entries

 * Disassembled parts
 * "Object scan complete. This is a component of an incomplete mechanoid. Design similarities exist between incomplete unit and the rogue mechanoids of Luminoth design found throughout this area."

Trivia

 * Quadraxis&apos; head possesses three "eyes" connected to form a triangle. This symbol, resembling the Luminoth letter "F", is found on many other artifacts of that species, and on the Luminoth themselves.
 * Disassembled parts of Quadraxis can be seen scattered throughout the Fortress Temple entrance, suggesting that the Luminoth were in the process of making more than one.
 * This could also suggest that the parts were already on Dark Aether when it formed, and the Ing somehow managed to properly assemble it; the parts lying about on Light Aether could suggest that the Luminoth did not manage to finish Quadraxis before their defeat, or that they did not want another Quadraxis to be possessed by the Ing.
 * Quadraxis is one of the largest bosses in the Metroid series, alongside Kraid, Mogenar and Phantoon.
 * Quadraxis&apos; head when exposed is similar to an Aurora Unit. This may suggest that it is a Luminoth variant of the Mother Brain created by the Chozo, and the Galactic Federation-created Aurora Unit.
 * In early screenshots, Quadraxis was blue with green armor. Another notable fact is that even though it briefly changes color when possessed at the beginning of the battle, it is the only possessed creature in the entire game to maintain its original color scheme.
 * Probably because of the Ing controlling it, Quadraxis is most vulnerable to the Light Beam.
 * The music heard when battling Quadraxis is a remix of the Ing Battle theme. Here is a link to the music heard when battling Quadraxis:.
 * Samus can reach Quadraxis without the Ing Hive Keys, by Sequence Breaking.
 * Unlockable artwork for SkyTown in Metroid Prime 3: Corruption shows a strange structure, with a Quadraxis-style head atop it.
 * Quadraxis&apos; battle formula is similar and comparable to that of Stallord, a boss from The Legend of Zelda: Twilight Princess. The idea is that the first phase deals with the whole entity itself by damaging the body, and then the second phase has you going after its floating head. However, Stallord isn&apos;t a machine, but a giant fossil powered and animated by Zant&apos;s black magic.
 * In the recent blockbuster "Prometheus" by Ridley Scott, the spaceship Prometheus strongly resembles Quadraxis, especially when you look at the knee joints.