The void knight seal is an item used in Festival of the Dead. It is placed on the coffin to remember the Void Knights who have fallen to pests within the Pest Control minigame. It can be located washed up on the small patch of sand between the piers for the easy and medium difficulty boats on the Pest Control island.
It gives 5,000 bonus prayer experience. This requires 20 Prayer and 40 combat.
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- The name of the item is capitalised as "Void Knight seal" on the ground but "Void knight seal" in the inventory.