PHANTASMIC SUBSTANCE

The Antagonist’s physical substance is of a form of matter alien to the World in some way, whether it’s from another part of the universe or a different universe altogether. This alien matter reacts in strange ways with normal matter, often either consuming or replacing it on a cellular level like a disease of chemistry. Areas the Antagonist has spent more than a scene in acquire an increasingly otherworldly cast that deepens the longer it spends there — eventually, the locale will come to look completely alien.