The Lost Halls is an endgame dungeon designed to be among the hardest content in the game. In addition to the main dungeon, there are 2 sub-areas: the Cultist Hideout and The Void, each with their own boss. Details about each sub-area can be found on their respective page. This page describes the main dungeon.
The portal is a guaranteed drop from the Lost Sentry event boss, which spawns up to once per realm.
|The Realm Eye says:|
Oryx’s takeover of the realm resulted in many different efforts to reclaim the land. While fighters such as yourself attacked directly, researchers explored more scientific solutions.
To safely conduct research inside the realm, an enormous network of experimentation rooms were built deep underground, spanning almost the entire realm.
Highly unethical tests took place in the now abandoned halls. Documentation in this library is limited, but I believe written texts with greater detail exist somewhere in this world.
The Lost Halls Key is available in the Nexus for 200 .
See the Lost Halls Guide for a walkthrough on the dungeon.
The Lost Halls is composed of a large 8x8, 8x9, 9x8, or 9x9 procedurally generated “grid” of square rooms with hallways connecting them. Enemies are found in these rooms, with each room containing one Group Leader commanding their respective group. The rooms tend to look similar, but can have randomly-generated gimmicks found in them. These gimmicks range from beneficial to dangerous, such as arrow/bomb traps, ice tiles, Corruption, Marble Eyes that provide AoE status effects, etc.
The dungeon is fairly big and the boss doesn’t have a Quest marker until found, making it hard to navigate.
There are several notable rooms that are different from the others.
The Starting Room is a square room containing 1-4 Pillars inside, facing a wall. In order to enter the main dungeon, players will have to stand close to these Pillars to drop their invulnerability and kill them, opening up the corresponding path in the wall. Each pillar has 15,000 base HP, 35 DEF, and HP Scaling.
Exactly five of the seven dead ends have a multitude of Treasure Pots that can drop bonus loot such as Tinctures, Effusions, and Stat Pots. A number of the Pots will spawn Evil Spirits, but one of them will have a passive pink flame that will teleport itself to the Treasure Room boss. These flames are essential for accessing the secret area of the dungeon. Additionally, after a Flame is found, it becomes visible on the minimap, thereby revealing the location of the Treasure Room.
One of the dead ends will be a Treasure Room. The Treasure Room is a large room identical to the ones normally found. It is completely empty except for the Treasure Room Boss, the Agonized Titan, in the middle and a locked portal to the Cultist Hideout. This room can only be entered from below.
The last dead end, just before the boss room, is a relatively empty room, containing only the Marble Defender. Once found, it will become each player’s Quest, making it easier to find for players that have split up. After being defeated, the wall behind it opens to the Boss Room.
The Boss Room is a large square room, much larger than the normal rooms found in the dungeon. The Boss resides in the middle of the room. This room has one entrance which is blocked off by the Marble Defender, and the entrance seals off after the boss is activated
Enemies in the main dungeon are lumped into four categories: Lost Crusaders, Oryx Infantry, Grotto Beasts, and Lost Golems. Enemies will always be found in these groups, which are detailed below.
Note: Most the enemies here give abnormally high amounts of XP, especially the leaders of each group, which give a whopping 4000 EXP (2 fame above 218 base). Combined with the large quantities of enemies present within the Halls, this makes it attractive for those wishing to gain a lot of EXP, as clearing everything before the boss can easily get players over 40 fame.
Defeating the Marble Defender will unlock the room containing the Marble Colossus, the dungeon boss.
After the Marble Colossus is defeated, it will leave behind several purple streaks on the floor. Using a Vial of Pure Darkness (obtainable from the Cultist Hideout) will unlock the entrance to The Void, the final area of the Lost Halls complex.
The Agonized Titan is activated by collecting 3 of the 5 pink flames in the dungeon, one of which is present in each of the 5 pot rooms. 45 seconds after 3 flames are collected, the boss will become active. After defeating it, a trapdoor to the Cultist Hideout will open.
|The Colossus||Defeat the Marble Colossus in the Lost Halls.|
|Havoc in the Halls||Take down Malus and the Marble Colossus for otherworldly rewards!|
A very high degree of teamwork and coordination is required to finish this dungeon. The layout is very confusing and the enemies require a large amount of combined DPS to take down. Stick together: spiltting up only makes it harder to take down the clusters of enemies.
Note, however, that there are no dead ends, meaning that any path leads to either the Boss, the Agonized Titan, or a Pot Room.
For Rogues who want to rush, beware of Grotto Blobs, Grotto Rats, Grotto Bats and Champions of Oryx, as they fire regardless of player presence. Especially beware the Grotto Rats, Grotto Blobs or Champions of Oryx - the first one because of their Quieting shots, the latter two because running into them will all but guarantee your death. This isn’t just for Rogue - it applies to all rushers.
It is important to remember that every enemy group has a different role to play in the dungeon. Keep their roles in mind when you engage them in combat. In addition, different groups in the Halls usually have common immunities and vulnerabilities.
Always stay on guard in case the Spectral Sentry appears. In case it does, make sure you have a clear path to escape the Sentry. But be careful after 15 seconds it will teleport to the nearest player or decoy. It will do this twice before it despawns.
This dungeon has 2 different true objectives:
Finding three passive pink flames from the treasure rooms to kill the Agonized Titan to reach the Cultist Hideout to obtain the Vial of Pure Darkness.
Killing the Marble Defender to reach and kill the Marble Colossus, then using the Vial of Pure Darkness to reach the Void and defeat the Void Entity.
Due to the difficulty of the dungeon, organised runs via Discord are the main source of consistently completing the dungeon. A list of Discord servers that may run Lost Halls, including its sub-areas, can be found in the ‘RotMG Discord List’ server.
Some raiding groups will opt to rush past all normal enemies in an attempt to reach the Marble Defender quickly. These runs are colloquially called “full skip Voids” and are quite risky to do as they rely on certain classes, namely Knights to stun enemy leaders and Mystics to stasis groups of enemies.