Let’s come up with a monster.

I think it would be good to take a few monsters from the Dungeon faction, such as: giant spider or Tiamat, Yeti, ice giant, Valkyrie, Nightmare, Avenger. To be honest, when I saw the expansion for the 5th part with the dwarves, I hoped to see a Yeti or Stormlord with an ice giant, but instead, there was some crappy tank.