Spirits Be With You

...mon

Prerequisites: The Fallen Chieftain part starts after you complete The Final Seal (more info inside) and have Revered with the Zandalari Empire.
So basically you need to complete 3 zone storylines and short final questchain in zuldazar.

For this achievement you have to complete 2 questchains.

1. 
   
2. First part about Vol'jin
   
   ID

   Quest

   Sidequest Chain

   Questgiver

   Subzone

   Video

   1

   Zalazane Returns

   The Fallen Chieftain

   Rokhan

   The Great Seal

   https://youtu.be/T6P1cWsDuZo

   2

   Broken Bargain

   The Fallen Chieftain

   [npc=137878]

   Darkspear Training Grounds

   https://youtu.be/bFHh3zuXwCs

   3

   The Glaive of Vol'jin

   The Fallen Chieftain

   [npc=120173]

   Darkspear Training Grounds

   https://youtu.be/hmgJq_LeaXw

   4

   Vengeance for Vol'jin

   The Fallen Chieftain

   [npc=137878]

   Darkspear Training Grounds

   https://youtu.be/p0pziiFyvBo

   5

   Honoring a True Leader

   The Fallen Chieftain

   [npc=137878]

   Darkspear Training Grounds

   https://youtu.be/QQLkIpOE45k

   6

   Vol'jin, Son of Sen'jin

   The Fallen Chieftain

   [npc=139928]

   The Golden Road

   https://youtu.be/6dhdMR4Ir60

   7

   Atal'Dazar: Ashes of a Warchief

   The Fallen Chieftain

   [npc=138138]

   [zone=9028] Dungeon

   https://youtu.be/12JHaSjPIM0

   8

   You Owe Me a Spirit

   The Fallen Chieftain

   [npc=138148]

   [zone=9028] Dungeon

   https://youtu.be/9UOlrR4af2A
3. 
   
4. Part 2:
   
   • 
     
   • The Lost Spirit
   • 
     
   • Spirit Call
   • 
     
   • Justice for the Fallen
   • 
     
   • The True Leader of Zandalar <= Justice For The Fallen
   • 
     
5. 
   

in before Vol'jin becomes the Loa of Kings replacing Rezan