Oubliette

For a list of all items and upgrades within the Construction skill, see Construction/All milestones.

An oubliette with a ladder, candles, an oak and steel cage, oubliette spikes, a skeleton guard and decorative blood.

An Oubliette is a room designed to be built below the Throne Room in conjunction with the Throne Room trap in a player-owned house. It can be built at level 65 Construction with 150,000 coins.

There are 6 hotspots available:

• Floor - Attacks and injures anyone unfortunate enough to have fallen in the cage through the Throne Room or via a teleport trap from the dungeon.
• Prison - Prevents escape from the trap, allowing more damage to be inflicted. Players must pick or force the lock. Note: If you remove your cage, you will lose the cage and anything inside it.
• Guard - Attacks any players during PvP (player-versus-player) or challenge mode.
• Ladder - Allows access to the throne room if it is there.
• Decoration - Ornamentation.
• Lighting - Ornamentation.

Floor

The centre floor is where players fall into from a Throne Room.

Item	Image	Level	Materials	Experience
Spikes		65	20 Steel bars, 50,000 coins	623
Tentacle pool		71	20 Buckets of water, 100,000 coins	326
Flame pit		77	20 Tinderboxes, 125,000 coins	357
Rocnar		83	150,000 coins	387

The Rocnar, Flame pit and spikes can be built without a cage. If you have already built a cage with a trap inside, both the cage and the contents inside must be removed to upgrade the trap.

Prison

To hold players dropping from a throne room above. Players have to pick the lock (using Thieving) of the gate, or force the lock (using Strength) of the gate, to get out. The stronger the cage, the harder it is for trapped victims to break out.

Players cannot open the cage from the outside, as the game will stop you from doing so. If you need to upgrade the contents inside the prison, you must remove the cage first.

Item	Image	Level	Materials	Experience
Oak cage		65	10 Oak planks, 2 steel bars	640
Oak and steel cage		70	10 Oak planks, 10 steel bars	800
Steel cage		75	20 Steel bars	400
Spiked cage		80	25 Steel bars	500
Bone cage		85	10 Oak planks, 10 Bones	603

Guard

Guards are activated when challenge mode (normal/PvP) is turned on and will attack nearby players. Spicy stew/Construction tea can be used to boost to the required level. The invisible bonus of the crystal saw does not work.

Name	Image	Level	Cost	Experience	Combat level
Skeleton guard		70	50,000 Coins	223	22
Guard dog		74	75,000 Coins	273	44
Hobgoblin		78	100,000 Coins	316	48
Baby red dragon		82	150,000 Coins	387	64
Huge spider		86	200,000 Coins	447	81
Troll guard		90	1,000,000 Coins	1000	95
Hellhound		94	5,000,000 Coins	2236	122

Ladder

Ladder back up to Throne Room above if one is present.

House guests can use the ladder to climb back up. If challenge mode (normal/PvP) is enabled, only the house owner can use this ladder.

Item	Image	Level	Materials	Experience
Oak ladder		68	5 Oak planks	300
Teak ladder		78	5 Teak planks	450
Mahogany ladder		88	5 Mahogany planks	700

Decoration

Item	Image	Level	Materials	Experience
Decorative blood		72	4 Bottles of red dye	4
Decorative pipe		83	6 Steel bars	120
Hanging skeleton		94	2 Skulls, 6 bones	3

Lighting

Item	Image	Level	Materials	Experience
Candle		72	4 Oak planks, 4 lit candles	243
Torch		84	4 Oak planks, 4 lit torches	244
Skull Torch		94	4 Oak planks, 4 lit torches, 4 skulls	246

Trivia

• One of the traps players can add is called a "Rocnar", which when spelt backwards becomes "Rancor". This was a monster from Star Wars episode 6, which tried to kill the protagonist Luke Skywalker.
• The hanging skeleton requires two skulls to build, although there are four hanging skeletons in the room.