Blessed Ankh Quest/Spoiler

You first need to get the Monk's diary from [this cave] in the Ghostlands near Carlin.

You will find a magic wall on a lower level. Nearby there is a Giant Spider guarding a switch to lower the magic wall. Defeat the giant spider, pull the switch, and then Haste back to where the Magic Wall was.

After passing the magic wall, go down a hole and follow a long passage north. You will encounter Demon Skeletons and Stalkers. Further, you will find a dead body. "Use" the body and recieve a Backpack with a book and some other things in it. This book is a Monk's diary.

Go back down the passage and take the portal out of the cave.

Take the book to the Isle of the Kings, and talk to one of the NPC monks you see - in the building on the east side. Ask him about the diary. He will examine it and give you a Blessed Ankh.