Divine carpet dust

Divine carpet dust is an effect that occurs when the player has acquired 330,000 overall Menaphos reputation and a Magic carpet (pet) active.

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 disappearing. Clicking it grants experience in the skill that they were training when it appeared.

When a wisp appears, a filterable message says:

and after harvesting the wisp:

Experience
Divine carpet dust awards 5% 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 6,450 additional experience an hour from divine carpet dust.