I am playing a Drow cleric of Calistria, who is going into the Mythic now, and my plan is for her to take Divine Source. So when that happens, she is going to become something akin to a powerful Herald of Calistria, who manages her Domains of Night and Chaos.
So thank you for the responses. They fall pretty much in line with what I have planned for my character. It would suck if the plan was completely outside of the Canon lore.
I have a simple question with a hopefully simple answer. Though if the answer turns out to be complex, that is okay too ;)
How would a mythic character able to grant spells to clerics fit into the cosmology of Golarion? Would they be consided deities, or perhaps demi gods? Or is there a different already established category they would fit into?
Actually, rereading the Path Ability again it only specifies that you have to be the target in order to Spell Turn the domain spells, not to ignore harmful effects.
It is still not likely to affect Spells like dispell Magic because they technically do not affect the character, but how about something like Deeper Darkness?