I couldn't help it; I immediately translated this to the Sanity loss rules from the old Chaosium Call of Cthulhu game.

'Okay, so this is a minor servitor. Square the number of dice you normally roll for an encounter, minimum of two dice. If it was a major servitor, minimum of four. For a Great Old one, cube the number of dice, minimum of six. Just roll ten dice for an outer or elder god. If it's a Shoggoth, don't worry about rolling. You're not going to survive anyway. When you fail your roll, you're a sex slave. NO, you can't keep running the character as a PC. Just...no."