Spectral Reaver

The Spectral reaver was the Wraith-blade's energy manifestation in the Spectral Realm and was the only weapon that could fight the inhabitants of that realm (aside from Raziel himself).

Being a spectral blade, it could not interact with objects or enemies in the material realm ( it's companion the material reaver was required for that).In Legacy of Kain: Defiance, when fully charged it does more damage and it's Reaver spell is a wide spread blast of spectral energy.