Key Retrieved from the Múr
A blackened key. Any door opened with it leads to a 15ft × 15ft stone room. The room can only be opened from the outside. Living creatures trapped inside die after 24 hours due to a lack of oxygen.
Sold by Mikhael the Merchant in Grift for a portion of the buyer's soul. A weapon disguised as a key. Shove someone through the door, lock it behind them, walk away. The next door anyone uses the key on is also a tomb.
Connections
Gaps / Expansion Notes
Whether the same 15×15 room is reached every time, or a new one each casting, is the canonical silence. If the same — the room is filling. If different — the city beneath is growing.