Secret Talismans
8 talismans form the Secret Talismans collection; each comes from its own talisman chest. Collecting all of them shows "You have collected all the secret Talismans!" and "A secret door has opened in the world.".
The collection
A talisman chest in Frozen Highlands
A talisman chest in one of the rooms the Deep Dark dungeon levels can be built from (not in every run)
A talisman chest in one of the rooms the Ravines dungeon levels can be built from (not in every run)
A talisman chest in Lullaby Hills
A talisman chest in one of the rooms the rift levels of The Sift can be built from (not in every run)
A talisman chest in Rainy Plains
A talisman chest in Humbler Huskland
A talisman chest in Howling Woods
The secret door
The door is a pair of barred gates in Howling Woods, marked on the map.