UK,
How do these sound as extensions of the subtle body chain?
GHOSTWALK [EPIC] (SU)
You can manifest on the Material Plane while ethereal as if you were a ghost at will.
Prerequisites: Balance 45 Ranks, Dex 40, Ether Goer, Sky Walker, Subtle Body,
Tenacious Body, Wis 40.
Benefit: You gain...