Seven Sisters

 is a limited-time building that was released on November 6, 2019, as part of Act 3 of the Treehouse of Horror XXX Event. It was the first prize to be won in the event's Act 3.

Trivia

 * Only one can be obtained.
 * It can be placed on grass, pavement, dirt, Krustyland road, boardwalk, pier, edge of boardwalk, or edge of pier.