Matryoshka

Among ordinary Matryoshka dolls, cursed ones have been secretly mixed in—vessels containing something that feeds on people. Your job is to carefully inspect each doll, one layer at a time. If you discover a cursed Matryoshka, you must immediately burn it in the sacred furnace to seal the curse. But if you fail to notice one… you won't survive. To inspect a doll, examine the pattern on each layer and determine whether it is a normal or cursed one. Miss a curse, or burn an innocent doll—even once—and there will be no forgiveness.