Manifested knowledge is the set effect that occurs when the player has the Ring of Whispers, Necklace of Shadows and the Combined Catalyst fragment equipped. These items are all rewards Sliske's Endgame.

While training a skill, a wisp will appear to the player every 4 minutes (240 seconds), following the previous one's spawn, and lasts for up to 1 minute (60 seconds) before dissappearing. Clicking it grants experience in the skill that they were training when it appeared.

Similar to Silverhawk boots, manifested knowledge awards 10% of a Small experience lamp's experience when caught. This is not affected by any kind of bonus experience or experience-boosting sets. Therefore the player could gain 12,900 additional experience an hour manifested knowledge.