The Mansion Key is a monster drop that can be found in The Nightmare. It can be found from various sources and locations throughout The Nightmare including but not limited to:
In appearance, the Mansion Key is a key made out of hardened bronze and gold. The Mansion Key is mainly used to unlock doors sealed with the keylocks that can only be opened by the Mansion Key. If the player has no purpose for the Mansion Key, it can be sold for 0 gold.
After leaving The Deli and traversing through the halls on the left side of The Mansion, in a corridor, and also next to one of the gates to The Library of Riddles.
After leaving The Deli, up the left side of the second floor of The Mansion, traversing through the rooms, skipping the archway that forks to a different path. Arrive at the place lit yellow/orange and purple, then through the multitude of shelves after an archway.
