Page 125, in the Adventure Design chapter says;
“There should be one problem that is simply too much for the players to handle: A creature high on the Order of Might; a creature with Nature of 10 or higher; obstacles rated at 6 and up.”
I’m trying to plan my first TB dungeon, and I really like the idea of one encounter being out of reach for the PCs. The trouble I’m having is that it is hard to justify monsters that are that powerful, since most monsters in that range fall into the categories of: giant, dragon, and elder gods. It just doesn’t make sense for the dungeon I’m thinking up to have any of those things. I’m thinking of an abandoned mine, infested with goblins. Any recommendations for a really hard encounter? It can be a non-monster encounter too.