Ghost Step

(Rule)
Description: The model may choose to treat all Terrain Features as Open Terrain for movement purposes, but must follow the Unit Spacing rule upon the completion of its moves. It can never end its move inside Impassable Terrain. If this would be the case, backtrack the move to the unit's last legal position (unless Fleeing, in which case the normal rules for apply).

In addition, the model automatically passes Dangerous Terrain Tests taken due to Terrain.