Diablo Immortal Last Mission Walkthrough
First, you will need to choose who to free.
Defeat Punisher of sin.
And then go to Pit of Anguish.
Destroy Pit of Anguish.
Reach the hall of Punishment.
After that, you have to search for Andalon.
Release Andalon.
And search for another Pit of Anguish.
You have to destroy Pit of Anguish.
Search for Shaddox.
Destroy the soul Siphon.
You need to defeat Shaddox.
Destroy another Pit of Anguish.
And enter Pit of Anguish.
Follow path inside Pit of Anguish.
Defeat Zaka the abyssal Worm.
Now you need to go back and talk to Verathiel.
Wait for them to open Portal.
Enter Portal to Skarn's Chambers.
Defeat the Skarn.
Get Yl'nira knife and worldstone shard.
Diablo appears.
Go to Deckard Cain.
Destroy worldstone shard.
Finally, you have to place Jered Cain's vision in Horadrim.