To add to this, it sounds like the encounter system in 4E will actually make this kind of thing EASIER to adjudicate than previous editions. The Chamber of Petrification will become an environmental hazard. Figure out about how long the chamber takes to kill a player, and what precautions can be taken against it, and you'll (presumably; this is all assuming that the traps/environmental stuff pans out the way they are claiming) have something that can be dropped right into an encounter with the dragon, with a reasonable approximation of the difficulty of the encounter and an experience value which takes it into consideration.FourthBear said:Perhaps the Dragon of Fear and Flame has a chamber that slowly petrifies whomever enters. Do we *really* need to detail a ritual that allows this to happen? Would having "Create Chamber of Petrification" be a good use of page space in the MM? If there is a necessary warding that you feel is needed for all lairs, isn't that an issue for the game? If a player asks how such a chamber came about, do you need anything more than noting it's the result of foul magic? Just create cool, interesting encounters and work out how it all came about as appropriate for your playstyle.