Dark Agon

From Wikitroid, the Metroid wiki

Dark Agon is the twisted version of the Agon Wastes, located on Dark Aether. Its atmosphere is the least poisonous compared to Dark Torvus and the Ing Hive. However, many Ing and Inglets still thrive there, and for the average player coming from Agon it is most difficult. However, the area is saturated with Light Crystals and Light Beacons, so maneuvering without the Dark Suit is easy. It is also the location of the guardian of the Space Jump Boots, Jump Guardian. The Dark Temple's guardian is Amorbis.