Chapter 4: The Missing Link

 is an introductory quest to The Cloaked Ascendancy Campaign. Completing this quest unlocks River District and The Cloaked Ascendancy Campaign

Steps

 * Meet with Saga Bradda
 * Meet with Captain Linkletter
 * Uncover the Truth in the Cathedral of Madness
 * Fight Through Aberrations to Reach Their Leader (6)
 * Defeat the Cultist Leader
 * Examine the Altar
 * Return to Lord Neverember