This question I am asking due to recently having this problem with 3 character death's (two where the same character.) when one monster attacks them. Two of them are due to critical strikes but I'll explain how they happened. The first was my bard (lvl 1) who out of the three I had the least problem. He falled 3 perception checks to see the ghoul rogue sneak up on him. She rolled and landed all three attacks (all with sneak attack due to me being unaware) and did more then my total hit points and constitution. The second character (Ninja lvl 3) how ever is where I had problems. The villian for the encounter was a summoner with a eidelon which was an amazon version of herself. The party was made of an alchemist, a gunslinger, and an oracle plus my ninja. the alchemist had us not kill her thugs at the store before hand so they alerted her to our prescense. the fight began and the we were pushed out and made to fight at eidelion. The mob imediatly walke towards the oracle so I moved my ninja up to help protect him. The mob then hit the oracle and my ninja (my hit was a critical and with it's two punches killed both characters. I barely had the resources to rez my character then I got a play the Mask of Rasmeir module. One of the enemies (Krant I this he was called, our barbarian overseer) attacked the rouge. The GM rolled his two attacks and with the first one knocked out the rogue. I was behind the mob (trying to flank) so the Gm transfered the critical to my ninja who with all his rage bonuses and weapon damage proceed to completely one shot the ninja. I don't want to sound like a whiner but this does seem unfair the there are mobs in modules you are suposed to be lvl for and they can one shot you with a critical. Is there rules about one shotting players or is it just up to gm discression. Thank you for your time.