Please add custom difficulties

[Espiovvv]

I want my run to have a 33% die success chance, but with more rewinds and redraws, please add customizing difficulty parameters.

[Disnag Burnazog]

Interesting idea. I'd lock it behind winning a game or some other requirement, though.

[Pizzarugi]

+1

[Cryolite]

There are already 2 Boons with that function in Fate's Ledger: The Magician's Boon and Blessing of the Stars