Pure Faintstone can be acquired from Crystal Lizards in world 5-2 and 5-3, Shaman Depraved Ones, Giant Depraved Ones (rare drops), or a guaranteed manner from speaking to the female Worshipper of God nearby Saint Urbain. She will only hand it over when the player has a Faith level of 18 or 20, but if Saint Urbain arrives before it is received, she will give it away to him.