User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-3481504-20150921004414/@comment-26992577-20150921013017

ImperiexSeed, see it that way, even with all the power in the universe, just could not change the value of Pi (in euclidean spaces), it will always remain the same,  it's by nature something beyond physical or supernatural. I imagine The Darkness in the same manner, as something beyond destructible, a fundamental thing that has no attribute "vulnerable".