Into Mantol-Derith

 is an introductory quest in the Underdark Campaign. It can be taken from Bruenor Battlehammer in the Gauntlgrym Throne Room at the end of the Chapter 9: The Dwarven King quest, or from Captain Belgold in Protector's Enclave.

Steps

 * Go to the Driftwood Tavern
 * Find Spider in the Driftwood Tavern
 * Speak with Drizzt Do'Urden
 * Go to Mantol-Derith
 * Speak to Bruenor Battlehammer