Shape Earth

This gemstone is a favorite food of earth elementals and they can be persuaded to do some heavy lifting in exchange.
Skill required: Geography
Benefit: For the duration of the [Scene] you can manipulate the terrain slowly with concerted effort and the cooperation of nearby earth elementals. This lets you dig trenches and raise earthen battlements, or otherwise alter the earth to suit you within a 120 ft radius. Once you begin work, it takes at least an hour to affect any meaningful changes, and up to three hours for more intricate work like basic fortifications.