Ashen Feathers

Scattered across the world of Ashen are 15 Black Ashen Feather (+2 Health each for a total of +30 health) and 15 White Ashen Feathers (+2 Stamina each for a total of +30 Stamina).

Redditors BarbarianBunny and gehtsiegarnixan created this map detailing where every item in the base game can be found, including all thirty feathers. Note than some items (including one White Ashen Feather) are missable if you don't get them in the introduction (before you fall into the water).