| Key to Carcosa | |
| Set | |
|---|---|
| The Yellow Sign | |
| Type | Subtype |
| Exploration | Key |
| Card Text | |
| Discard this card when you attempt to move through a "King's Chamber" to discard the Lock card. | |
Key to Carcosa is an Exploration Card that appears in the Mansions of Madness First Edition The Yellow Sign.