Acid_crash said:It sounds like a great encounter, until one of the players says, "It's an orc, kill it." and the group hacks it apart.
Consider it one of my pet peeves of D&D, but I know that most players know most stats of most monsters in these books by heart, and know how best to combat them. Even if you tell them that if they don't have the knowledge skill on their character sheet, they don't know about the monster...the players will still react as if they do know because, as players, they DO know about the monster... and I don't know too many DMs that enforce that kind of roleplaying in a standard D&D game session.
So, when the party comes across some trolls, out comes the fire and acid, even if the characters have no clue what it is they are fighting.
Good luck in trying though.
I honestly think the MM books are the most read books in print, even more so than the PHB. By both DMs and players.
I've barely looked at the 3.0 and 3.5 MMs... but, that is because I'm a player most of the time.
However, I've been playing D&D for 25 years now and I still get excited when a good DM runs a low level encounter with orcs straight out of the MM. While the player & the PC may know it's an orc, it can still be a harrowing encounter if done correcly.
Back on topic now. Since 2E days, we have used Knowledge-Monsters as first a Non-Weapon Proficiency and now as a Skill in 3.0/3.5.
However, it is also assumed that players have a general knowledge of the more common monsters – if a village is plagued by constant goblin raids at night, it is assumed that most know at least something about goblins – do not like the sunlight; not strong, but sneaky and crafty; general size and appearance.
It also extends to other things that are fairly common knowledge as well – trolls do not like fire; undead are repelled by holy symbols; vampires are bad mo-fos.
However, if you want to distinguish between a ghoul and a ghast or know about the societal structure of your typical hobgoblin tribe, it requires a Knowledge check.