Diablo II/Forgotten Tower

While exploring the you may find and read the Moldy Tome, activating the fourth quest.

Once again this is entirely optional: if you haven't already done so, you'll need to follow the path through the Stony Field, navigate the to the, and then continue following the path to the entrance to the Black Marsh.

The in Hell can drop the Keys of Terror needed for the ; she also has a significantly higher chance of dropping  in all difficulties (up to Ist in Hell).

Black Marsh
The Black Marsh is randomly populated by three of the following six monster types: s, s, s and s, Goatmen and s. There can also be encampments of Carver Shamans and Carvers.

You'll most likely need to leave the path and explore to find the, and a waypoint: if you find the tower first, you may want to cast a Town Portal there before resuming the search for the waypoint, which would allow you to return to camp to take the portal back to the tower. You may also want to return to the path and follow it through the Tamoe Highlands to the Monastery Gate, where you'll always find a waypoint in the middle of the beyond. However, the path through the Black Marsh forks, and you may need to retrace your steps from the Hole if you choose incorrectly.

Hole Level 1
This is an optional area, randomly populated by three of the following four monster types: s, s, and s. There can also be encampments of s and Carvers.

Hole Level 2
This is an optional, but much smaller, area, similarly populated to the previous level.

Forgotten Tower
The Forgotten Tower has collapsed into ruin, but you can enter it by going through a doorway in its southwest wall and down the ladder in its north corner.

It's empty, except for the entrance to its cellars in its northwest wall. If you haven't read the Moldy Tome in the Stony Field, this quest is now activated. If you return to camp to talk to anyone:

If you return again before completing this quest:

Tower Cellar Level 1
Each Tower Cellar level is randomly populated by three of the following four monster types:, s, and s. The most direct route to the next level down is normally to the left: this is particularly important to remember in Nightmare and Hell, since the levels become much larger.

Tower Cellar Level 2
This level is similarly populated to the previous one, only the monsters are higher level.

Tower Cellar Level 3
This level is similarly populated to the previous one, only the monsters are higher level.

Tower Cellar Level 4
This level is similarly populated to the previous one, only the monsters are higher level.

Tower Cellar Level 5
The fifth and final level is similarly populated to all previous ones, but it's always quite compact. The entrance is at one end, with a central chamber with two doorways in the walls to either side: the pair closest to the entrance lead to rooms whose floors are covered with gold, while the pair furthest away lead to passages to either side of the room containing the Countess herself.

Countess
🇨🇴 Care for a bloodbath? 🇨🇴 Your blood will boil! 🇨🇴 Once she's aware of you, she casts walls of fire at both entrances to her chamber. While it may be tempting to run through into the room beyond, it's better to wait outside and try to lure out her Dark Stalker minions (and any other monsters within): since they're aggressive melee attackers they're happy to oblige.

By herself the Countess normally isn't particularly dangerous, although due to her Unique bonus she always explodes upon death, so take care when you kill her. The first time you do so, the chest in her room opens in a fountain of gold: you may need to pick it up simply to see what other items may have dropped.

In Hell, she can drop the Keys of Terror needed for the ; she also has a significantly higher chance of dropping in all difficulties (up to Ist in Hell).

If you talk to anyone upon your return to camp: