With Phase 2 confirmed to go live on the PTR, players will want to start completing their attunements to the two new raids before they will be able to enter on release.
If players want to complete these raids on the PTR as well, they will need to attune before copying their character over.
Serpentshrine Cavern Attunement Guide Burning Crusade Classic
Players must be level 70 and attuned to Coilfang Reservoir Heroic Dungeons.
Defeat the first boss of Heroic Slave Pens and once you pass through the first hallway into the second boss's room, clear the pack on the left-hand side, and pick up the quest from Skar'this the Heretic.
You will be tasked to find two signets from current tier raid bosses.
Find a raid group and defeat Gruul the Dragonkiller, inside Gruul's Lair to receive the Earthen Signet.
Next, you will need to venture into Karazhan and defeat Nightbane. At least one person in your group will need the Blackend Urn in order to summon the boss.
Nightbane will drop the Blazing Signet to complete the set.
With both signets now collected, return to Skar'this inside Heroic Slave Pens and hand the quest in. Skar'this will cast the mark of Vashj spell onto you and the attunement will be complete.
It is likely you won't complete this quest inside a daily lockout so be prepared to reclear Slave Pens to hand the quest in.