For Theros , it was "gods, heroes, and monsters." Devotion had been the mechanic aimed at Gods
There are some brands that have mattes/hyper mattes that dont stand up to the test, but you should probably stay away from those brands in general
These kinds of replacement effects don't affect the turn-based action of putting a single lore counter on a Saga at the start of your first main phase
There are good cards that will have to get swapped out in order to do so
Notably, the new Rise of the Floodborn Enchanted cards include a few surprising choices, with characters like Lady Tremaine and Nemaari getting a spotlight alongside classic Disney characters like Alice, Cinderella, and Snow White
The other equally obvious, and perhaps better home is a Goblin typal deck