Hollowcell

From publisher blurb: This game supplement covers "The Hollowcell", a new boss to fight against your players. 5e, Pathfinder RPG, Hexagon RPG and system-neutral compatible rules included. All the contents inside this product are meant to be used as stand-alone material for the "Hollowcell" game tool or inside of your ongoing campaigns by reskinning and adapting them to best fit your games.