The Moon-birch Railing is a fence you can build (the Dusk kit).
In-game description
Moon-birch posts and plum rails, a point to every bar. Pens animals in; a jump clears it.SHOWN IN THE BUILD RING
Building it
It costs 2 
Wood, 1 
Ghostcap, 1 Water spirit. It needs 2 Jewels first. Take it down with DISMANTLE to get its cost back (see Building).
