The Key and the Gate (mythos)
From Arkham Horror Wiki
The Key and the Gate is a mythos card. It first appeared in The Lurker at the Threshold expansion.
Card Information
Mythos Type: Rumor
Gate Opens: The Unnamable
Clue Appears At:
Mythos Ability: Ongoing Effect: Each time a Gate opens, place a Clue token on this card.
Pass: Investigators who end their movement in the Southside streets can discard two Gate trophies to return this card to the box and gain 2 Clue tokens.
Fail: When there are as many Clue tokens on this card as there are investigators plus one, return this card to the box and draw a new Mythos card. Treat any Gates opened by that Mythos card as Gate bursts and ignore the rest of the card.