Gorea

A monster of unthinkable power and incredible danger, Gorea is the being responsible for the extinction of the Alimbic race. It was then destroyed by Samus Aran many years afterward.

Origen
"The horror shrieked its name: GOREA!"

Alimbic Datashade, GOREA 1

At a point in time when the Alimbic empire in the Tetra Galaxy reached the peak of its power, a disaster occured that would eventually send the Alimbics to their doom. A meteor crashed onto their homeworld of Alinos, which is possibly the reason why the planet has become geologically unstable. A strange crimson mist billowed forth from the meteor, devouring all life in its path like a plague of locusts. Then the mist took the form of various native creatures, including the Alimbics themselves, using their natural abilities as well as absorbed weapons. In several months time, the empire had been broken. The last of the Alimbic elders came together to form the Alimbic Order, in order to carry out a last ditch attempt to stop the beast they called Gorea. They crafted the Seal Sphere and trapped the monster within it. The sphere was locked away on a prison called the Oubliette and sealed in another dimension with the space-rending Alimbic Cannon. The eight elders, with the last of their strength, sealed themselves within eight artifacts called Octoliths, which held the key to Gorea's prison.