Talk t your companion
I defeated the shade of Abnur Tharn, but Sai was swallowed into the dark void. I should talk to my companion to see what our next move is.
Defeat the Lyris Doppelganger
I've removed the shield around the shade of Lyris. Now I should defeat her before I can get to Sai.
Return to the Harborage
After speaking with Sai, The Prophet appeared and opened a portal to the Harborage. I should return to the Harborage and check in with the Prophet.
— game journal