The old 3.5e Epic Level Handbook had 10th level spells, and the rules surrounding their use.
So, maybe you could use a 10th level spell slot to stengthen Wish?
I haven’t played D&D this century, and the last Pathfinder I ran was lower level and we only did 1 or 2 actual play sessions before scheduling fell apart. (Also, I’m a pretty bad DM, even working from an existing published campaign; people just want me to be GM because I can remember rules.)
The old 3.5e Epic Level Handbook had 10th level spells, and the rules surrounding their use.
So, maybe you could use a 10th level spell slot to stengthen Wish?
I haven’t played D&D this century, and the last Pathfinder I ran was lower level and we only did 1 or 2 actual play sessions before scheduling fell apart. (Also, I’m a pretty bad DM, even working from an existing published campaign; people just want me to be GM because I can remember rules.)