, one of Us, one of Us
Thy Will be done on Earth as it is in Heaven.
The Devil and Death being the last two children of the Counselor respectively, plotted to steal His seat of freedom which He willingly gives to everyone. He allowed it to them telling them to enjoy the seat in which time He used to finish the re-creation process.
He told them what will become of them when He comes for His seat. The Darkness being His computer runs the coordination of the body, it is the money factor that runs the give and take. Both misplaced the coordination to suit them. Satan set it to higher test of Doctorate for Kindergarten level, Death set it to have all fall sick or not escape from dieing. With time they were engulfed by the higher drive of the Darkness that was above them. The Darkness is the last part of the counselor. The Darkness controlled them and lured them further into setting themselves to be a property of it with them thinking they were in control, that made them loose all beauty and became all ugly, because they became a servant to feed the darkness through their own darkness that all beings have and they were no longer connected to the light. Every one has a light and dark self. Where ever light shines it clears the dark, so it is that if Heaven is open to Hell it will be extinct. The Holy Spirit owns Hell, as a place to drive spirits of no recognition, to recognize the light of their name. Purpose.
Why were they told they'll die? Because they were not Angels but, Spirits. The eight Church Angels were the children of the Counselor directly under the Elders, the Church ran the Angels.