News from March 28, 2018
The Elf and Dwarf will visit up to once per week.
If you’ve defeated at least 3 Red Dragons, but haven’t yet purchased the Elf & Dwarf, you can occasionally play with them anyway. The Elven Huntress will visit if the villagers have found a +3 or better bow. The Dwarven Brawler will visit if the villagers found a +3 or better shield. However, neither will visit more than once per week.
You cannot swap to a visiting hero from within the game. So if you enter with the human, or swap to the human in the dungeon, you won’t be able to return to the visiting elf or dwarf, and you’ll have to wait for another visit. (Or purchase them!)