There is a small chapel along the main road, the shrine to no gods. It is kept by a cleric, Brother Germaine, head of the Order of No-God, a religious order that consists of one Brother Germaine. He receives about a dozen pilgrims per year.
The Order of No-God insists that there are no gods, that there never were in the first place, and that all this divine magic is locked inside mankind. Brother Germaine insists that he himself worships no gods, but that his meditations on the nature of man deliver him “divine” magicks.
And indeed, he is a cleric of name level with no apparent patron deity who can cast spells.
He is also as old as the planet, but has forgotten that.
A short one. Very late and lots of assigned reading to do.
You can have the party meet him on the way to an adventure, then find a statue of him or a reference to him existing in the same spot many thousands of years ago. Either as a plot point or a throwaway bit of atmosphere.