[Morgeruat]

My first experience GMing was with the ToEE (original module) that one of my friends had gotten on ebay, i ran it because he had just finished up an immense campain and wanted a break, it went very well, the Krell must be a new addition because the most dangerous 3 creatures in the moathouse were 1: a giant toad that could swallow characters whole, 2: an ogre, and 3: a priest with some nasty spells (if the priest was killed a 10th lvl assassin was sent after the characters about a month later) but once you got near the environs of the Temple itself things got nasty... but what do you expect from a module that took you from 1st to 8+ lvls

but I digress, the real character killing module was Tomb of Horrors, Gary Gygax himself designed it for the express purpose of taking down high level characters.