Plenty of systems have something for that, often with a variety of options.
A bookish Exalted character might roll Intelligence + Lore to remember having learned about the weakness to fire before. Or maybe Intelligence + Occult if the weakness is supernatural in nature. A combat-oriented character might roll Wits + War to deduce that fire is needed based on the knowledge of old battle reports involving trolls. Maybe even something involving Survival if they’re familiar with a region trolls can appear in.
A game with a flexible skill system has a lot of room for such things.
Plenty of systems have something for that, often with a variety of options.
I believe 5e has a similar rule, but it seems rare for players to have actually read the rules. I don’t think D&D is especially detailed about this, but I don’t know where the book is to check. I don’t think they give DCs, where I wouldn’t be surprised if Pathfinder 2e had a simple “target number is 8 + the creature’s HD” formula with guidance on what to do for the range of possible outcomes.
Plenty of systems have something for that, often with a variety of options.
A bookish Exalted character might roll Intelligence + Lore to remember having learned about the weakness to fire before. Or maybe Intelligence + Occult if the weakness is supernatural in nature. A combat-oriented character might roll Wits + War to deduce that fire is needed based on the knowledge of old battle reports involving trolls. Maybe even something involving Survival if they’re familiar with a region trolls can appear in.
A game with a flexible skill system has a lot of room for such things.
I believe 5e has a similar rule, but it seems rare for players to have actually read the rules. I don’t think D&D is especially detailed about this, but I don’t know where the book is to check. I don’t think they give DCs, where I wouldn’t be surprised if Pathfinder 2e had a simple “target number is 8 + the creature’s HD” formula with guidance on what to do for the range of possible outcomes.
Iirc it’s a level DC based off of the monsters level