Shadow Walker
You can pierce the veil between the Shadow Plane and the Material Plane more often, and to greater effect.
Prerequisite: Fetchling, shadow walk spell-like ability.
Benefit: You can expend one use of your shadow walk spell-like ability to use dimension door as a spell-like ability. Your start and end locations for this ability must be in dim light or darkness.
Source: Advanced Race Guide, p. 112