Void Energy is the energy of nonexistence or vacuum. By itself, Void is fairly harmless, since it is responsible for organizing time and space itself. Void is even beneficial to people who meditate as it clears their minds of unnecessary thoughts. It is a crucial element in the The Book of Five Rings. Feng Shui also makes positive use of Void.
Aggressive Void energy that moves to consume and obliviate is known as Blood Void.