Gates of Lightning

With lush land said to be greater than the Mohtrek Vale south of the searing Herelius' Steppes, trapped by mountains surrounding it, Matoran and Agori built the Gates of Lightning at the edge of Herelius' Steppes to make a passageway into the lush land known as Volkin. This is because crossing the mountains or sailing to Volkin is impossible. The Gates of Lightning was the largest Order Fortress, but, was only a crossing point into Volkin. However, many thousands of Matoran, Agori, Toa and Glatorian decided to inhabit and makes homes inside the Gates of Lightning. Only about a millenia later, Makuta Detrotyx, a Forsaken Exiled Great Being, was accidentally unearthed and freed by the Scourge, a race of undead BIONICLES, in the Northeastern Darkshrine Gulch. Derotyx quickly took over their capital, Demisis, and decided the Gates of Lightning would be another good place to take over. He soon corrupted the thousands of inhabitants and converted them into Scourge. However, a just a few hundred less than a thousand Agori and Glatorian survived, and re-inhabited a city just inside the Gates, and built a Gukko port for travelers who wish to dare the Gates of Lightning into Volkin.

Inhabitants
Glatorian patrol around the Gates of Lightning, battling in hate skirmishes against Nether Toa and the Scourge. The Agori and Glatorian have a tenuous peace with the corrupted scourge, to fight the dreaded Nether Toa from the Outer Remnant. As stated (sort of) earlier, the Glatorian patrolling non-Order areas only fight Scourge or vice versa only because of hatred for the opposing race or faction. The Nether Toa inhabiting the Gates of Lightning did not originate from the Magna Void or the Outer Remnant. Instead, because Derotyx only corrupted them into Scourge, he turned several thousands of Toa into his nether minions, putting his actual grasp in the Gates of Lightning into play.