>>718215459
White materia was ultimate protection materia to defend planet from all threats, humans included. Black materia was ultimate destruction materia.

In Rebirth the ghosts of Gi, now revealed aliens who couldnt merge to the planet's lifestream as they were outsiders, wanted Black Materia to destroy the plsnet and their own after-life limbo existence. Pic related of Aerith asking if she's intolerant too after the Gi accuse Cetra for bein intolerant of them