The Endurium Door is a door you can build (the Endurium kit).
In-game description
Gilded leaves banded in bright gold. E opens and shuts it.SHOWN IN THE BUILD RING
Building it
It costs 1 
Endurium Ingot, 2 
Wood, 1 Water 1 Earth 1 Wind spirits. It needs 4 Jewels first. Take it down with DISMANTLE to get its cost back (see Building).
