Throne of Carcosa
When you gain this card, choose a street area in Arkham and place this card there. Any investigator ending his movement in that street area may spend Sanity up to his focus. For every 1 Sanity spent the investigator gains 1 Stamina.
The fictional city of Carcosa first appeared in Ambrose Bierce's short story An Inhabitant of Carcosa (1891) and was later used by Robert W. Chambers for his anthology The King in Yellow (1895). Not much is known of Carcosa - it is probably located on another planet, if not in another universe.