[@Aisling]DM stands for Dungeon Master, which comes from the original Role Playing Game, Dungeons and Dragons. The DM is the person who controls what the players will encounter on their adventure. D&D, which is what it's called for short, is a pen and paper game based on dice rolls and an active imagination. The rules for the DMing that I'm doing are fairly simple, I am using an online dice roller to roll a 20 sided die to get three numbers, I then use those numbers to determine what the Shadow Beast will do.