Piratecat
Sesquipedalian
shilsen said:You could require casters with access to all spells on their spell list (clerics, druids, etc.) to start with the PHB list, and for each non-PHB spell they want to use, they have to lose access to a PHB spell of the same level. So the number of available spells remains the same.
This is what I do, and it works really well. Clerics have to make hard choices, and they tend to know the details of obscure spells a lot better. The only necessity (as always!) is DM approval, to keep unbalanced spells out of the game.