Playable on one of your Deep Mines sites. The Deep Mines site is now adjacent to an Under-deeps site of your choice whose surface site is in a region containing or adjacent to the region containing the Deep Mines surface site. The movement number required to move between these two Under-deeps sites is (7). This card may also be played as a hazard on one of your opponent's Deep Mines sites. Discard this card when Deep Mines is discarded or returned to its location deck. Cannot be duplicated on a given Deep Mines site.