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 the manifestation power of ghost while on the Ethereal Plane. Activating/devactivating this ability requires a standard action.
WALKING DREAM [EPIC] (SU)
You can turn yourself incorporeal at will. Activating this ability requires a standard action.
Prerequisites: Balance 50 Ranks, Dex 40, Ether Goer, Ghostwalk, Sky Walker, Subtle Body, Tenacious Body, Wis 40.
Benefit: You can become incorporeal at will. Activating/deactivating this ability requires a standard action.