Flop and three fellow thieves were sent into the catacombs to investigate some disappearances near one of the Thieves' Guild's hideouts. They encountered and easily slew a group of Grimlocks. Then a robed and hooded figure, a Mind Flayer, appeared and used Domination to force one of the thieves to backstab and kill another. Then it used Psionic Blast and Flop was overcome with fear and ran.