phoffman
Explorer
As a general rule don't make monsters "immune" to party tactics and abilities. It has consequences that are often difficult to judge.
What is the Monster's Role in the story?
If your going to make an enemy resistant or immune to something the players often do, for it to feel proper you have to foreshadow that event. Also when you do this you have to ask yourself, is it effecting just one player? If so make sure there is something special that is part of this fight that that character can do instead. (manning a non-portable repeating ballista, ect.)
It is ok to surprise the players with a monster's abilities, (i.e. has an ability that causes aoe, when it is hit by radiant, lighting, or fire) But if you do surprise your players you have to calculate that into the difficulty of the combat.
What is the Monster's Role in the story?
If your going to make an enemy resistant or immune to something the players often do, for it to feel proper you have to foreshadow that event. Also when you do this you have to ask yourself, is it effecting just one player? If so make sure there is something special that is part of this fight that that character can do instead. (manning a non-portable repeating ballista, ect.)
It is ok to surprise the players with a monster's abilities, (i.e. has an ability that causes aoe, when it is hit by radiant, lighting, or fire) But if you do surprise your players you have to calculate that into the difficulty of the combat.