Seven for a Secret, Never to be Told is a mythos card. It first appeared in the Miskatonic Horror expansion.
Mythos Type: Environment (Mystic)
Gate Opens: Wizard's Hill or Unvisited Isle
Clue Appears At: Gardners' Place or Science Building
Mythos Ability: During the Upkeep Phase, the first player rolls 2 dice. If the sum of the result is 7, each investigator wih no Clue tokens gains 1 Clue token and loses 1 Sanity.