Passage

Passages are the areas where The Beheaded will find themself when going in between areas. A passage will usually take the appearance to the biome it leads to. Each passage will contain The Collector, who will take blueprints and cells to unlock items, mutations, and permanent upgrades, the Blacksmith's Apprentice, who will reforge the nodifiers and upgrade your gear for coins, and an NPC who will give you mutations to assist on your run. The passages on 4/5 boss cells do not have The Collector. The passages after boss biomes (Black Bridge, The Nest, Insufferable Crypt, Clock Room, and Guardian's Haven) all contain the Blacksmith and the Legendary Forge who take cells for permanent upgrades on the quality of gear you find.