Drakador_Chaos
When I said recover, I meant it does not permanently cease to exist. It reappears almost immediately.
The only thing that can damage Darkness is Light. If darkness ceases to exist, but there is no light, what do you have left? The darkness is there, as dark as it had been before.
Even if you did use Light to "kill" the Darkness, it would simply reform when the Light passes. You can clear the darkness from a room by turning on a light, but when you turn the light back off, darkness fills the room once more. In that sense, nothing can really kill darkness.