Combat rating: -5
Defenses: Magical Immunity
Start of Battle: Any investigator with no gate trophies is devoured.
Attack: Each investigator must pass a Will (+1) check or lose 1 gate trophy. Any investigator with no gate trophies left is devoured. This check's modifier decreases by 1 each turn (+0 the 2nd turn, -1 the 3rd turn, etc.)
Doom Track: 12
The name Yog-Sothoth first appears in The Case of Charles Dexter Ward (1927), written by H.P. Lovecraft. Actual details of his attributes appear in The Dunwich Horror (1928), also written by H.P. Lovecraft.
The difficulty increase caused by Yog-Sothoth's power The Key And The Gate does not affect the number of clue tokens required to seal a gate. The power only requires an extra success when attempting to close a gate.