Oofta
Legend
Some groups are okay, and even embrace metagaming. Some groups play with people who have never read a MM or hit specific monsters. Some groups simply ask people to minimize metagaming as much as possible.
I fall in the last group. I also assume a fair amount of knowledge about things like trolls need fire to stop regeneration because as much as it's fun to throw things at players they don't understand you can't surprise someone who's played for a period of time will know about it whether or not they act on it. Trolls simply aren't that rare in my world.
If I want to set up the monster that can't be killed until you find it's weakness, it will likely be a custom monster. Since I use custom or reskinned monsters on a regular basis it's not a gotcha, I just think it's fun to be surprised and have an in-game puzzle now and then.
I fall in the last group. I also assume a fair amount of knowledge about things like trolls need fire to stop regeneration because as much as it's fun to throw things at players they don't understand you can't surprise someone who's played for a period of time will know about it whether or not they act on it. Trolls simply aren't that rare in my world.
If I want to set up the monster that can't be killed until you find it's weakness, it will likely be a custom monster. Since I use custom or reskinned monsters on a regular basis it's not a gotcha, I just think it's fun to be surprised and have an in-game puzzle now and then.