The Moon-birch Wall is a wall you can build (the Dusk kit).
In-game description
Pale birch boards and battens under a plum beam carved with little moons.SHOWN IN THE BUILD RING
Building it
It costs 3 
Wood, 1 
Ghostcap, 1 Water 1 Earth spirits. It needs 2 Jewels first. Take it down with DISMANTLE to get its cost back (see Building).
