At 4th level, a shadowdancer gains the ability to travel between shadows as if by means of a dimension door spell. The limitation is that the magical transport must begin and end in an area with at least some dim light. A shadowdancer can jump up to a total of 40 feet each day in this way; this may be a single jump of 40 feet or four jumps of 10 feet each. Every two levels higher than 4th, the distance a shadowdancer can jump each day doubles (80 feet at 6th, 160 feet at 8th, and 320 feet at 10th). This amount can be split among many jumps, but each one, no matter how small, counts as a 10-foot increment.