Tomb Raiding

 is a repeatable weekly quest in the Mended Grove area of the Sharandar Campaign zone. It becomes available upon completion of the final quest in The Soul Keeper episode, To Hades and Back Again.

Steps

 * Enter Mathilda Soulstealer's Lair
 * Remove the Cave Barrier
 * Reach the Antechamber
 * Put the Royal Undertaker to Rest
 * Remove the Antechamber Barrier
 * Clear the Antechamber
 * Remove the Throne Room Barrier
 * Weaken the Hag's Power by Releasing Souls
 * Defeat King Thurduin
 * Stop Mathilda Soulstealer
 * Speak to Thradisar in New Sharandar
 * Return to Pelendethas