To Hades and Back Again

 is the final quest in The Soul Keeper episode in the Sharandar Campaign. It becomes available upon completing the previous quest, The Walking Trance.

Steps

 * Speak with Thradisar
 * Destroy the Barrier
 * Complete the Night Hag'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 (0/6)
 * Defeat King Thurduin
 * Stop Mathilda Soulstealer
 * Speak to Thradisar in New Sharandar
 * Return to Merrisara Winterwhite