The jar can be used on a boss lair display in a player's Achievement Gallery to have a display of The Nightmare. Doing so requires killing it at least once.
Item sources
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Changes
Date
Changes
[[{{#explode:25 September 2024| |0}} {{#explode:25 September 2024| |1}}]] [[{{#explode:25 September 2024| |2}}]] (update)
The item's inventory icon was adjusted.
Trivia
When players have the jar in their inventory while casting the Dream spell from the lunar spellbook, the screen will slowly turn black, and The Nightmare's face will show up, together with the sound of the Armadyl crossbow's special attack.