A Sacred Urn is an item in Problem Sleuth and Homestuck.

In order to increase your score, you'd have to hunt around in the game and look for these urns to topple over. Problem Sleuth didn't really get to topple any though as none of the urns were ever found.

In Homestuck, a Sacred Urn containing the ashes of Nanna Egbert sits on the mantle of the fireplace in John Egbert's living room. John successfully topples the urn over and spills some onto the floor. He tries to Captchalogue the ash back into the urn, but he does a really lousy job.

Later, the urn is knocked down again by the impact of a Colonel Sassacre's book and the ash flies out, accidentally completing John's sprite's tier two prototyping, creating Nannasprite.