Ultima VI: The False Prophet/Dungeon Hythloth

News about the Underworld
As Mariah suggested, travel to the Dry Lands (near the Shrine of Sacrifice, east of Minoc) and ask Sin'Vraal about the Book of Prophecies and about sacrifice.

There is more about dungeon Hythloth. Many characters, especially from Buccaneer's Den, link it to Captain Johne. The gossip about him are reported here, starting from the most wrong. Indeed, only Leodon and Zoltan have reliable information about this character.

One last note about one inhabitant of the underworld, Beh Lem, is referred by the wandering bard Mandrake:

Dungeon Hythloth
'"Hythloth" is a shortened form of "high sloth". According to the Ultima philosophy, Sloth is the opposite of Spirituality. As the virtue of Spirituality comes from the union of the three principles of Truth, Love and Courage, the sin of Sloth comes from the union of the three anti-principles of Falsehood, Hatred and Cowardice.'

The dungeon entrance is on the Avatar Isle, just in a corner nort-east from the Shrine of Humility, beyond the river.

Dungeon walkthrough
From the entrance, follow the walls clockwise: this way, you will collect a couple items before reaching the ladder down. Follow the walls counter clockwise to collect sulphurous ash before you get to the next ladder down. In the middle of the lava there is one "oasis" with a ladder down: you can collect some gold there, but remember to cast "Mass Protect" or use purple potions. Here you are forced to walk on lava. And not just once, but twice. Remember to use purple potions or a "Mass Protection" spell. The ladder down is to the south-east. Travel to the south-west. Eventually, you will meet the house of Captain John, a former Companion from Ultima 5. Talk to him: he will give you vital information about the gargoyle city, and also a magic vocabulary. Use the vocabulary, and all the Companions will magically learn the Gargish language in the blink of an eye.
 * Floor 1
 * Floor 2
 * Floor 3
 * Floor 4

Captain John and Beh Lem


On the bottom floor of Dungeon Hythloth the Companions meet Captain John. He gives them instructions about the Gargoyle city of Investigations, and also recommends that they wait for the young Beh Lem.

As soon as you exit from Dungeon Hythloth, wait for noon. When Beh Lem arrives, talk to him and let him join your Companions (you will probably have to ask someone to leave; keep Sherry, Blaine and Julia, if they are in your party). Beh Lem starts at level 2; if leveled up, he can become the strongest companion.