The boss lair display can be built in the boss lair space of the achievement gallery in a player-owned house. It requires 87 Construction to build and gives 1,483 experience when built. The player must have a hammer and a saw in their inventory to build it.
It is a place where players can show off the bosses they've killed. The display can be configured to show any display that a player possesses.
To display a boss lair, the player must have killed the boss once and must put in the jar dropped by that boss. In Vorkath's case, the player needs to defeat his post-quest variant.
Note: Roughly half of the tradeable jars come from Slayer bosses, and as such, require a high Slayer level along with the respective slayer task in order to defeat and display them.
The jar can be removed, returning the display case to its unfilled state and the jar to the player.
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| Boss
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Kraken
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| Jar
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Jar of dirt
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| Cost
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36,794
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| Examine
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A large display of the Kraken in their dank lair.
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| Boss
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Zulrah
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| Jar
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Jar of swamp
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| Cost
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77,705
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| Examine
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A large display of Zulrah in her poisonous lair.
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| Boss
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Sarachnis
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| Jar
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Jar of eyes
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| Cost
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67,415
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| Examine
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A large display of Sarachnis in the Forthos Dungeon crypt.
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| Boss
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Araxxor
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| Jar
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Jar of venom
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| Cost
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Not tradeable
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| Examine
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A large display of Araxxor in a venomous cave.
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- The glass casing of the Grotesque Guardians and Hydra displays are slightly taller than the rest of the boss lair displays.
- The Nightmare display's examine text is likely a reference to the 2015 indie game Undertale, which contains a song titled Your Best Nightmare.