User Summary: The River Styx Phantasmal Filters is part of Hellscape. The River Styx Phantasmal Filters is part of the Phantasmal Filter subset that contains translucent printed plastic film for use with the DF Light Panel to create glowing floor features. This item was initially available as an add-on for the Build Your own Hellscape pledge level or included in one of the other pledge levels during the Hellscape Kickstarter. River Styx Phantasmal Filters comes with these 4 pieces: (4) 8x8 River Styx Phantasmal Filters (GO-654)