The blade would have been a temporary enhancement, though when lost it could presumably be re-imbued from boulders or other stone objects. The blade was intended to be have several special abilities; petrifying enemies in a single strike and shattering them with a finishing move which also caused area damage.[1]
Despite being removed, a placeholder for the blade can be activated in game through the use of the debug menu - where it was misattributed as the Sunlight Reaver during reconstruction of the Debug menu. The blade is revealed as a bright white Wraith blade enhancement. None of the special abilities were present in-game[1][Soul Reaver].[3]
Early attempts to activate deleted Reavers in developmental beta versions had attributed a yellow-orange Reaver as the Stone Reaver but these had been referring to an incorrectly assigned early Water Reaver.
Once Raziel has visited the Stone Forge and baptized the Reaver in the elemental altar, the blade has the potential to be imbued with stone wherever it appears in the environment. Once manifest in the material plane, the blade can be imbued with stone by striking it against objects made of the same distinctive stone.
A single blow stuns the affected enemy, effectively paralyzing/petrifying it for a period of time. A second blow destroys the enemy, shattering it on impact. An enemy struck only once will eventually recover, breaking free from its petrified state. Other adjacent enemies (within a small radius) are affected by the shock-wave of the second (destroying) blow. All enemies within proximity are automatically knocked into a stunned/damaged state.
The Stone Reaver projectile petrifies a single enemy, essentially an extended stunned state, during which the enemy is frozen (but will recover).
―Steve Starvis (Eidos)
[4]
The Elemental Reavers at The Lost Worlds (by Ben Lincoln)
