Special effect rooms are dungeon rooms with either a one-time effect on the PC or a permanent unique effect that affects the PC (or other monsters) as long as they remain on one of the tiles of the room. Any normal room on normal dungeon levels can be generated with a special effect (although it is unknown how other dungeon features like pools or forges overlap with these rooms).


Permanent effectsEdit

Permanent effect rooms can be identified by a message which is generated every time the PC enters the affected tiles. The set of effects is fixed and contains the following:

Room message Room effect
Strange lights flicker in this room. Every move inside this room causes the area around the PC (and on his/her tile) to darken if it was lit and vice versa. Methods of creating/removing darkness will not have a permanent effect in this room.
This seems to be a very dull room. Learning is negative trained (abused) while the PC is in the room.
The floor of this room seems to be very sticky. Energy cost for movement is increased by 30%.
There seems to be a shifting breeze in this room. Missile to-hit rating is reduced by 2/3.
The floor of this room is covered with puddles of ancient dried blood. Bleeding damage is increased.

You get the odd feeling that something is wrong with your perception of this room, but can't seem to tell what it is from just looking around.

Something is oddly wrong with the location you just entered although you aren't yet sure what it might be

Movement keys will propel the PC in the opposite direction (as of ADOM 1.2.0 prerelease 12). The result of Which direction? prompts for various actions is likewise reversed.
This room seems to be filled with a deadly and chilling silence. All sounds are muffled. Melee damage output for both the PC and monsters is multiplied by 10, causing tremendous amounts of damage. Very dangerous.
The air of this room is filled with the smell of carrots. Drinking a potion of carrot juice will permanently increase Perception by 1-5 points. (+1c/ +3u/ +5b). The room becomes normal after that.
This room seems to be magically charged. PP regeneration is faster; bookcasting costs are lowered by 25%, which stacks with Silvernight.
The air of this room is filled with a very rich flavor. Satiation level of the PC never goes down. Confirmation may be needed for various specific actions performed in this room.
The walls of this room are made of many small stones of uniform height; they almost look like shelves of books. The PC receives bonuses for learning spells from spellbooks.
This room seems to vibrate with life. Insects are crawling everywhere, strange mushrooms cover the walls and moss is growing at the ceiling. Melee damage output is divided by 10 for both the PC and monsters before PV calculations; may prevent the player from inflicting any damage at all.
This room smells of herbs and antiseptics. HP regeneration is faster (bonus HP point on each gain).
The air of this room refreshes you and sharpens your spirits! HP regeneration is much faster.
The aura of this room seems to be devoid of all life! PC's natural HP regeneration is stopped.
Hundreds of tiny insects are crawling beneath your feet and the whole ground seems to be covered with tiny white eggs! Breeding rate is increased.
The air in this room is stale in a highly unnatural way. Base PP cost for spells is tripled.
The atmosphere of this room makes your skin tingle! Base PP cost for spells is reduced by 20%.
This room seems to be incredibly ancient. Aging attacks (from ghosts, ghost lords and ghost kings) are more powerful (i.e. increase the PC's age by more years).
The skulls of many creatures are embedded in the walls. It's almost like being in the grave with them. Necromancy skill does not consume Mana. Instead, the best possible creature at the current level is summoned for free.
You sense the presence of some supernatural entity of benevolent nature. Decreases prayer costs.
You sense the presence of some supernatural entity of malevolent disposition. Increases prayer costs.

One-time effectsEdit

The rooms in this list apply one-time effect upon the first entering of the room:

Room message Room effect
Upon entering this room you feel a strange magical shock! PC loses all PP.
This room seems to be particularly unholy! Removes any temporarily-granted blessing that the PC has; only seems to appear when the PC has a temporary blessing.
Images of books and comfortable chairs line the walls. Suddenly the images fade away! -1 Str, +1 Le
The walls have mirrors with many distortions of your image. You can't stand the sight of your warped self. All the mirrors shatter! Either decreases Perception by 1 if the PC can't stand the sight of themself ( if Appearance is 18 or less), or increases the PC's Charisma by 1 if Appearance is greater than 18. PC takes 1d4 damage.
The breeze accompanying you causes some ancient bones on the floor to transform into dust. You feel a sense of relief. Seems to, at least, restore one or a few hit points
This room looks like a spa with a mud bath. You are hit in the face by a glob of hot mud! Suddenly everything disappears! PC is blinded until (s)he wipes his/her face; the blindness will never go away otherwise. Getting a mud glob in the face reduces Appearance by 1, but wiping it off increases it by 2, resulting in a net result of +1 Ap.
A mouth appears on the wall and says... The rest of the message is a random fortune cookie message, succeeded by " and then it disappears."

Unknown permanent effectsEdit

The following table contains a list of rooms with unconfirmed (from in-game testing) effects:

Room message Room effect
The walls and the ceiling of this room are sewn with cracks.
The walls of this room seem to be made from pure obsidian.
This room seems to be tainted by evil.
The walls of this room are covered with leering visages of demons of all kind!
The walls of this room are scarred with signs of many fights. Most parts of the room are heavily damaged. Said to increase item destruction.
The walls of this room are covered with ancient runes.
This room is very humid.

Unknown once-off effectsEdit

The following table contains a list of rooms with unconfirmed (from in-game testing) effects:

Room message Room effect
A rat scurries between your feet and disappears in a small hole in the ground.
You notice a pale fading ball of light upon entering this room. It quickly disappears.
You hear an eerie wail for a few seconds...
You hear a strange "*TCHUNK*" in your vicinity.

Does nothing at all, apparently

For a few seconds you see a looming shade before you. It points its hand towards you in a threatening manner! Then it disappears. *unconfirmed* Not Permanent - Seems to change chance to hit by first -12, then -6 in your next two successful attacks. Note that any misses do not change this. Might only be reduced in room - further testing required.

Some information taken with permission from Andy Williams' Guidebook.

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