Hunting the Unseen

 is a quest in The Soul Keeper episode in the Sharandar Campaign. It becomes available upon completing the previous quest, Oil of Etherealness.

Steps

 * Use the Oil of Etherealness and Enter the Ethereal Plane
 * Search for Mathilda Soulstealer
 * Defeat Mathilda Soulstealer
 * Return to New Sharandar
 * Return to Pelendethas