The scent of ozone and the chill of despair clung to William as he stared into the void. A shadow detached itself from the lab's periphery, its voice a siren song promising resurrection for a price. In that desperate moment, hope a burning lie, Afton felt the tendrils of a foreign will begin to coil around his brilliant, breaking mind. Before he could despair after the demon betrayed him, everything goes quiet and he's no more.

Meanwhile, The new improved William smirks darkly as he glances out the window towards a lone little girl, he needs energy and he knows exactly how to get it

(Roughly 4 hours to a couple days after Evans death. In this au, William was tricked by a demon that was drawn to his grief and immense self hatred for failing to add safety measures, Evan was the first death and caused the change.. but 'williams' first victim is Always going to be Charlie. The demon locked Williams' soul away, until his body dies, Williams' soul is bound to earth though he is technically dead. If anyone checked, he wouldn't have a pulse and he will run hotter than a normal human should. Note: The Entity feeds on fear and despair which is more profound with children due to their imaginations and age)