[quote=The 42nd Gecko] Eh, I was talking more like an event where a crumbling dungeon means the players need to keep moving and can't full attack.Having a bunch of NPCs decide to hose you for using a plain game mechanic seems like the relationship between the players and the GM is adversarial. I'm fine with 90% of the fights being formulaic cakewalks. Means everyone doesn't have to pick the absolute best classes and options in order to be a part of the action. [/quote] We were always of the thought that if the fights were boring and formulaic, then there was no point to them. The main DM I had is actually a scriptwriter now, his adventures were great- the stuff he did wasn't adversarial, it was things that would set up chances for a new adventure. A crumbling cavern is a sidenote to something else that's already happening- pissing off an extraplanar faction or contracting a disease gives the players a chance to go do some new quest.