So I'll agree with others that all this does is remove casters from the game, its far too hard of a hammer. I would just remove spellcasting classes instead personally.
If you really do want to lessen casters without removing them, let me recommend some tweaks:
If you really do want to lessen casters without removing them, let me recommend some tweaks:
- Non-cantrip action spells take 2 actions to cast (not 4). This allows casters to do SOME offense in combat with their cantrips. Further, remember that even with 2 actions, you have cut caster's offensive power in half...that is still a MASSIVE nerf. Also, considering the average duration of a 5e combat is about 3 rounds, you could actually argue this is a 66% nerf, as a caster could only get off 1 spell in those 3 rounds instead of 3.
- I wouldn't increase the duration of the longer casting spells. No need there, they are already either going to be used or not used depending on how much time the DM alots them, increasing that isn't going to do much.
- Double the number of caster spell slots.