Volcano

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Built from enormous blocks of obsidian, this sweltering chamber may once have served as a temple to some strange deity, or perhaps the dwelling of a mighty fire giant. The air shimmers with oppressive heat, and the dull roar of the volcano's heart never ceases.

Leading directly into the rock is a dark and forbidding tunnel. Every so often air, hot enough to singe your face, blasts from within, and, as though triggered by the air, rocks fall from the roof and sides of the tunnel, slowly filling the entry.

The volcano is a single-floor mini-branch one can reach via a timed portal that shows up in the early- to mid-game (the Lair or the Orcish Mines may have such entrances). The volcano usually contains fire-themed monsters and loot, but may also feature the undead, various humanoids, a surprising number of toenail golems, and the occasional unique. Its most defining feature is that it occasionally erupts, with predictably dreadful results.

Layout

Although some variation is possible, the volcano generally consists of a small entrance area, a large central chamber with a lava pool taking up much of the area, in the center of which is a stone- or metal-walled chamber filled with fire-themed loot and powerful monsters. Other formats can incorporate twisting, narrow passages or a small central chamber with multiple branches each containing small piles of loot. One possible layout is a stone structure that is completely shielded from the volcano; eruptions here will instead collapse portions of the roof, sealing off the treasure chambers one by one (move quickly if you want to get the treasure; Apportation and Haste will both help).

Be aware of the message, "The air gets thick with the scent of sulphur." This means that large portions of the volcano will soon be filling with fire clouds, and in some maps will cause new rock walls to form. If this happens, you may need levitation and dig to fully explore certain maps.

Strategy

• Even a single rank of fire resistance can make a big difference. Pile it on as best you can. If you lack it, be aware that much of the loot found here will provide it (though you'll probably have to fight your way through to get at it).
• If you have Mephitic Cloud, you can avoid eruptions easily by creating mephitic clouds on yourself before the eruption occurs. New clouds cannot form on tiles that already have existing clouds. Just don't wander around while confused.
• Conservation will protect your scrolls fairly well, but it's probably wisest to drop off any valuable ones you're carrying before going in.
• Most things found here will be weak against cold, though mummies instead fear fire.
• Stealth helps tremendously here, giving you the option of ignoring all those pesky monsters living in the lava which really don't pay off when killed.
• Confusion can be absolutely lethal if you can hit an enemy standing by the edge of the lava with it. Although time-consuming, this CAN allow you to avoid death curses.

Timeout Messages

1st: "Rocks fall inside the tunnel."
2nd: "Debris falls inside the tunnel, filling the entry."
3rd: "Rocks fall inside the tunnel, blocking the entry."
4th: "Rocks have almost completely blocked the tunnel."
Final: "There is a deep roar within the tunnel. Moments later, a river of lava pours forth, sealing it permanently."

Monsters

Near-all volcanos contain the following:

• S Lava snake
• w Lava worm
• b Fire bat

The majority of volcanos (58.06% chance) have a long list of monster sets and corresponding bosses, equipped with flaming weapons and fire-resistant armour if possible. The chances will differ depending on the volcano's entry being in Lair or Orc, with the humaniod sets being slightly less common in Lair:

• Orcs (10.91% chance in Lair, 13.64% in Orc)
  • o Regular enemies consist solely of orc warriors.
  • o The boss has a 20% chance to be Urug, and a 40% chance each for an orc sorcerer or an orc knight. If Urug has already spawned, the other choices have an equal chance.
• Ogres (10.91% chance in Lair, 13.64% in Orc)
  • O Regular enemies are (66.66% chance) two-headed ogres (with flaming giant clubs!) or (33.33% chance) hill giants.
  • O The boss has a 20% chance to be Erolcha (if she hasn't spawned yet), and is otherwise an ogre mage.
• Centaurs (10.91% chance in Lair, 13.64% in Orc)
  • c Regular enemies are (66.66% chance) centaurs (with flaming arrows) or (33.33% chance) yaktaurs (with flaming bolts).
  • c The boss has a 20% chance to be Nessos, if he hasn't spawned yet, and otherwise is a centaur warrior (with flaming arrows).
• Salamanders (3.64% chance in Lair, 4.55% in Orc.)
  • N Regular enemies consist solely of salamanders.
  • N The boss is always a salamander mystic.
• Deep elves (3.64% chance in Lair, 4.55% in Orc.)
  • e Regular enemies are (even chance) deep elf fighters or deep elf priests.
  • e The boss is always a deep elf knight.
• Beasts set (22.5% chance in Lair, 18.75% chance in Orc.)
  • l D Regular enemies contain (27.78% chance) fire bat bands, fire drakes, mottled dragons, (8.33% chance) komodo dragons, or hell hounds.
  • l D The boss is (40% chance) a manticore, a lindwurm, (10% chance each) a fire dragon, or a fire crab.
• Demonic set (15% chance in Lair, 12.5% chance in Orc.)
  • 8 4 The regular enemies contain (20.83% chance each) crimson imps, red ugly things, toenail golems, red devils (with fixed flaming plain tridents), or (16.67% chance) hell hounds.
  • R 3 The boss is (equal chances) an efreet, a sun demon, a smoke demon, or a hell knight with weakened equipment.
• "Unliving" set (15% chance in Lair, 12.5% chance in Orc.)
  • E 9 The regular enemies contain (9.09% chance each) gargoyles, fire elementals, red ugly things, earth elementals, and fire vortexes.
  • z 9 The boss is, with an equal chance for each, an efreet, a molten gargoyle, or a flaming corpse.
• Mixed non-humanoid set (7.5% chance in Lair, 6.25% chance in Orc.)
  • h H The regular enemies contain, with an equal chance for each, hell hounds, fire drakes, toenail golems, fire elementals, and manticores.
  • @ t Boss is either a hell knight with weakened equipment or a fire crab.

Other volcanoes each have their own set, which can contain specific selections of above monsters. Exceptions include one specific layout containing undead tombs with mummies, player-species skeletons, and vampires, and another that places no monsters at all. There is also a small chance of meeting the firespitter statue in select vaults.

History

• Volcanoes were added in version 0.6-0494f2c3.
• Before 0.12-164fcaaa, the sets were quite weak. Humanoid sets included plain orcs, big kobolds, and gnolls, while the non-humanoid sets featured bizarre monsters solely based on having a red glyph in console such as pulsating lumps, worker ants, and redbacks.
• In 0.15-34da2974, a previously-disabled set will be re-enabled, which mixes together the humanoid sets [and changes the odds]. It possesses orc warriors, centaurs, two-headed ogres, and deep elf fighters (all at equal chances), but has unique bosses:

@ Harold d Red draconian d Mottled draconian