Spectral Reaver

The Spectral reaver was the wraith-blade's energy manifestation in the spectral realm & was the only weapon that could fight the inhabitants on that realm (aside from Raziel himself). Since it is in the spectral realm to even have this form, it cannot interact with creatures or things that are in the material realm. In Legacy of Kain: Defiance, when fully charged it does more damgae & it's spell is a wide-spread blast of spectral energy.