Silithus

Silithus forms the southwestern corner of Kalimdor. It can only be reached on foot by traveling to the northwestern corner of Un'Goro Crater, where a wide path extends out of the crater and into Silithus.

History
Silithus has for thousands of years held the prison of the Qiraji, trapped behind the Scarab Wall in the aftermath of the War of the Shifting Sands. The Qiraji's servants, the silithid, have since multiplied and spread across southern Kalimdor. Seeing this, the night elves decided to reopen the Gates of Ahn'Qiraj to put an end to the Qiraji threat once and for all.

Elementals invaded the area only to be fought by the adventurers of the Alliance and Horde. Prior to the start of the Invasion of Outland, Silithus was invaded by a group of Burning Legion demons led by Highlord Kruul.

At the climax of the third invasion of the Burning Legion, Sargeras attempted to destroy Azeroth. Although he was stopped and imprisoned by the Pantheon, he did manage to wound the planet in Silithus. Azeroth's world-soul began to bleed out of the wound Sargeras inflicted, forming a pool of arcane blood in the area. As a result of the damage, Azerite - crystallizations of her blood - began to emerge across the planet. At the Seething Shore off of Silithus's coast, Alliance and Horde began to fight over it.