Change Spell Save DCs Ability

[Larkas]

Academic Priest and Dynamic Priest both change the ability that determines bonus spells per day and maximum spell level (to Int and Cha, respectively), but both do nothing about the spell save DCs. Now, I'm sure that if something like that existed it would be more widely publicized, what with MAD Favored Souls and such, but asking wouldn't hurt: is there any way to change the ability that determines spell save DCs, be it through feats or otherwise?

[Psyren]

I recall a feat that does this (Lost Tradition?) but it might be Dragon or third-party or something. I remember it not being totally legitimate somehow.

[Larkas]

Hmmmm, I'd love to see it, anyhow. I'm okay with 2nd party producers, and even some 3rd party, if they are reasonable, and this just might be the case :smallsmile: