I wanted to start a thread discussing some creative applications of Bestow Curse and Major Curse.
There are the conventional debuffing uses: -6 to an ability score, -4 to pretty much any d20 roll, and 50% chance of not acting; it's the fourth, open-ended use which is of interest. Of course, one can be awfully silly and try to break the spell, but these are 4th and 6th level spells, respectively, so effects should be commensurate with those levels.
Here are two (similarly-themed) I've used:
- Bestow: "May your eyes never again behold what which is beautiful." - effect is that cursed victim cannot see beings with greater than 16 charisma, rendering them effectively greater invisible to the victim. This mimics a 4th level spell (greater invisibility, for a restricted group (-), but the effect is permanent (+), which seems to balance out for a 4th level spell.
- Major: "All the world will be blue in your eyes." - effect is that the victim sees everything as the same shade of blue, making it very hard, for example, to resolve different items in the background; it also renders the victim unable to read, since both the page and the lettering are the ame shade of blue... this is quite crippling for prepared casters, who can no longer read their spellbooks, use scrolls, and so on. This mimics a very particular sort of "feeblemind" (a 5th level spell) with other optical debuffing effects (+), so it seems reasonable for a 6th level spell.
I'd love to see more ideas! I think a format like above is nice - the type of curse spell, the nature of the curse, and it's mechanical effect (if any).