The rogue is skilled at lateral thinking and deduction from limited information.
Once per day, she can make a Knowledge skill check to learn a piece of information she has no way to know directly so long as she has some piece of indirect evidence for it. If the result of her check exceeds the DC by at least 5, she learns a related fact for every 5 points by which she exceeded the DC. She risks dread from learning unsettling knowledge normally. The rogue can use this ability a second time per day at 8th level and a third time per day at 16th level.
Sandy Petersen’s Cthulhu Mythos, © 2017, Petersen Games; Authors: Sandy Petersen, Arthur Petersen, Ian Starcher.