The Antorus Raid Quest is now available in the PTR. This quest will unlock access to the raid. Currently, the location where you would zone-in into the raid is blocked by rocks. As soon as you accept the quest, a cutscene is unlocked, showing the Vindicaar ship blasting through rocks to open a way into Antorus. The portal becomes visible after this cutscene, allowing players to zone-in into the raid dungeon.
After completing the quest, Velen provides the next quest which requires you to defeat the World-Soul: “The Death of a Titan.” In addition, I checked the Dungeon Journal. The Argus the Unmaker Overview and story is now available in the Dungeon Journal. Read the Spoiler below.
Collect the Motes of Titanic Power while you are a ghost to empower Khaz'goroth, enabling him to cast Titanforging.
Alternate tanks on Argus to minimize Sweeping Scythe damage.
Constellar Designates equipped with Sword of the Cosmos and Blades of the Eternal should be tanked (Melee Attack damage increased by 300%). Additionally, try to keep the Designate equipped with Sword of the Cosmos away from any other designates to avoid Cosmic Power stacking too high.
Collect Motes of Titanic Power while you are a ghost to empower Khaz'goroth, enabling him to cast Titanforging.