Darryl Greymantle (not his real name) was one such dungeon master. After years of playing a kind of D&D that can only be likened to Squid Game mixed in with the Saw film franchise - he ran out of players willing to play with him. There was no doubt that he was one of the best DMs to have ever graced the isometric maps of adventure - but the attrition rate was too high. And more often than not his campaigns ended with one of his many legendary "Party Killers".